My biggest pet peeve is when places say they are dog friendly but aren't. Especially restaurants that put you on tables with no dog room.
I recently had to take my dogs on an emergency trip on a train a significant distance. I arranged it all and was very clear about having two dogs and being on my own.
The restaurant i booked put me on a table where there was no choice but for my dogs to be in the way (tiny table in the middle of the room).
The hotel that was dog friendly, had a dog friendly restaurant etc actually didn't allow dogs in the breakfast bit (fair enough but should have told me when I booked breakfast whilst holding 2 dogs). I could neither take them with me nor leave them in the room. The staff were completely bewildered when I pointed this out.
I booked seats (2 to allow me to sit alone for leg room for the dogs!) and spoke to them about having dogs, had to spend most of my several hour journey hanging out in the doors because I was put in a table seat where the dogs would have been on strangers feet
If you aren't dog friendly then say so!
I would much rather people say, actually our space is too small etc so you can plan
There's nothing worse than having to constantly apologise for dogs being the way when you've paid/ booked for them to be there
It also made me realise how little is set up for one person with dogs, toilets, bars hotels etc seem to assume you can pass them off to someone else to do the important bits