Air BnB - would we get turned away for bringing an extra person?

Like I said, a lot depends on the guy himself.
Is he a UKIP supporter when others might be, er, not... is he a Celtic fan when the others love Rangers? A smoker when some of the group are strongly anti?
The OP might be in the early days of an intense relationship and can see or hear no wrong about her new love. That braying laugh or annoying titter is probably still music to her ears.
The times I have heard X or Y friend saying 'I'd like to bring new boy/girlfriend along, they are great, you're going to love them...'
Well, not always.

I would want to have met a person I was spending a weekend away with.

Ask the hosts, or just leave it this time. Adding someone no one else knows last minute really changes the atmosphere.

When is the cancellation deadline up?

I would ask the host or get him to stay in a nearby B&B. I would be delighted for a friend to bring a new partner, especially if everybody else was in couples. I would be pleased for you and look forward to meeting the new man.

Fully agree
OP you should ask the hosts
If they say no book a nearby hotel for the two of you

LOL at all the posters saying OP shouldn’t bring her ‘stranger’ boyfriend when it’s a couples trip. Fair if she was trying to bring him to a girls trip but wtf, why should she be the only single one there when she’s not actually single anymore? Surely her friends will be excited to meet the new guy and if not tough, she’s entitled to bring him assuming the accommodation can be sorted.

And ask all your friends too. Are they really ok with it? Some might be happy but others not.
So what do you do then?

Is he gonna be paying his share back to everyone?

It would not just be "super cheeky" it might invalidate your booking depending on what the insurance the owner of the air B&B has and how the house is set up. That could mean that none of you are allowed to stay and none of you get any money back. Definitely ask the host.

whose name is the booking in? Because if you don’t get permission and take him anyway there could be repercussions for them with using Airbnb in the future.

Have you asked your friends? Do they know the new guy and like him?

A holiday is not a good time to try out new dude with friends.

You seem defensive.

Plus there's the max occupancy and insurance issue.

We are hosts in Italy. Here we have to fill in an online form for the police with photos of all the guests passports. We get fined thousands if we get caught having not done it. It's how they tax our income.

We wouldn't be allowed to exceed capacity of the bnb, but we could have him as a guest in our house next door, on paper at least, and then just let him stay with you. My point being, you need to tell the host, let them decide if it's possible. I personally wouldn't charge you extra either. I'd do my best for you, because you'd been honest.

OP, you weren't in a relationship when you booked this trip, so it's more a case of inviting a virtual stranger than bringing a partner, which is very different.

Depends on the bloke and the circumstances, if you and he are in the throes of a new relationship it can be quite tiresome for others in the group to have to put up with 'new couple' PDAs, over the top lovey-dovey behaviour and perhaps wanting to split off from the rest of the group and do things on theirr own.
Which won't be what the others signed up for or are expecting.

And if the new guy is anything other than very easy going and sociable, you can be sure some people won't be happy about that either. Eg if he's a bit loud, or opinionated, or a bit of a drinker when the others aren't (or vice versa).
And some people just won't like the changed dynamic. This is all about you, really. Why not go away with him on your own at a later date?

If your friends are OK with it I'd probably sneak him in, to be honest.

I've also got an AirBNB next to our house, and because it's quite remote, we're not on mains drainage. The system is set up for a maximum number of people and if guests sneak extra people in, there's a real chance it can cause problems for the cottage and for us! We explicitly don't allow parties for this reason, and have had to cancel bookings when guests let slip they were planning to host bigger gatherings.

Plus there's the insurance aspect, plus the fact that sofas aren't supposed to be slept on, plus the hot water/towels/seating/cutlery, plus the general ick factor of having to have that conversation with the host when they realise you're trying to pull a fast one... I just wouldn't.

I’d want your partner to come in this situation OP, and be really happy about it.

We often go to Air bnbs near my daughter’s uni - we book for us a a couple (and a dog) so usually one bedroom.

daughter and her boyfriend almost always have dinner with us at the Airbnb and hang out, and one time, both slept in the lounge.

we’ve never had any issues.

if it’s a place for 7 adults and you’re happy to squidge into the single bed together, I really cannot see the hosts would have an issue.

prepare for 7 seats around dining table, 7 place settings, though, so take some extras with you xx

Provided you have enough beds.

Where is it? We have an airbnb attached to our home, the maximum number of people we can have is four, our fire risk assessment, insurance etc is for a maximum of four guests, so we would say no, we would also have to ask guests to leave if they chose to bring more than four people in their party. Then you have to factor than airbnb for seven may only have seven dining chairs, place settings etc. Him sleeping on the sofa also dictates peoples bedtimes and get up times, which is fairly poor.

It costs whatever it costs for the property. I think this is fine!

I do charge extra pp

What do you charge the extra for? In this situation there wouldn't be extra bedding or towels to launder as I am assuming the host only has enough to cater for 7 people.

If there was a spare bed you said you weren't going to use then yes that would be unfair to the host.

Ask all your friends, ask the host.
If it's cool with everyone, go for it.
If it isn't, sneak him in anyway, inside a sleeping bag don't do it 😀

I’ve done this, not partners, but family, and also had different people one night and the next, but only after checking with the host. They’ve all been fine but I didn’t exceed occupation levels which I think could well be an issue due to insurance. I normally nowadays have to give all details of all people staying, security I guess which is tighter.

To be on the safe side I'd book a cheap hotel room nearby. But there should be no issue in him spending the day with you all. I've never seen any 'no visitors to the property' in the house rules of any Airbnb I've stayed in.