Staffing - as I've said before it's going to be nigh on impossible to social distance behind a bar, or in a kitchen, in pot wash area etc. So there's going to have to be less staff. People are going to have to adjust their expectations of service time. Not only is it going to take longer to get a drink and a meal because it'll be table service, there won't be two people behind the bar. Maybe one making the drinks and one taking them to the tables. People aren't very good at adjusting expectations, and they're going to expect the same service they got before, without exception. Look at how people are behaving over queuing for supermarkets, when things have run out etc, add alcohol to that and it's going to magnify.
But table service is already common on the continent. Whenever I've been in Greece we were always served at the table. I think pubs have changed in the last 10 or 20 years here anyway. The more successful pubs are the ones that offer a reasonably priced family meal.
In the countryside we started to see them being multi functional. Pubs being more like a corner shop during the day. Offering groceries and so on or even post office facilities. Which I think is a great idea
Trying to ensure people under the influence social distance is just....... Not going to work. Like I said before people have enough trouble with licensing laws being enforced by bar staff. Some are not going to listen, others are going to get upset at that and the staff are going to expected to referee and sort it out, which isn't going to happen because no one listens anyway.
This is more a problem with the younger crowd. But my children do not go to the pubs and clubs as much as I did at their age. We did it from Thursday right through to Sunday and I can remember pubs being packed out on a Friday afternoon when everyone recieved their weekly wage packet. Those were the days!
But my own children and their friends, while still pubbing it and clubbing sometimes, seem to do other recreational things as well. Meals out, the cinema or bowling etc . They also don't seem to consume the vast amounts of alcohol we used to either. I can remember many times waking up on a Saturday morning with a hangover and then we all went straight to the pub at 11am. Or having a massive hangover at work on a Monday morning but I dont think young people tend to do this as much now.
And that's assuming that places can get enough people through the doors under social distancing, and they spend enough money to at least break even.
But as above I think the nature of pubs was changing anyway
It's going to take a massive change in customers behavior for it to work, that's going to be the biggest challenge.
I think people will want the change. They will want to social distance because they understand the importance of it. The pubs that will be successful in the future will adapt to the customer, as they have before the crisis. Pubs change, the inns of old were for travelers or passing trade and more like a Wetherspoons than what we think of as a local or town centre pub.
I dont think pubs will go away anytime soon but adapt as they always have throughout history