I live in the UK. My experience has been that the selection of beers isn't that seasonal. Sure there will be guest beers in some pubs/chains but for example I can go to a Sam Smith's pub and they have four stouts year round plus a pretty good porter. Just a lot of people don't like to go to Sam Smith's pubs because the owner has... feelings about one thing and another.

So if I'm meeting friends usually there's something nearby that we're planning to do and in a great number of pubs the choice is Guinness or nothing.