First part of the bank holiday weekend

I'm free from the afternoon of Friday 4th May to about lunchtime on Sunday 6th, when I have to go off to a wedding.

I can see a lot of things at the theatre etc, or games here (London SE4, easy from Blackfriars or London Bridge, or bus from New Cross / Crystal Palace, sleeping space) or somewhere else?

I've finally got my paws on a game from 1979 which I'm tempted to run for work (it's useful for anyone who has to go to committee meetings and get the result they want) and/or BiCon... but I'm open to suggestions.