It has been suggested for some time now that we should have a meet-up night out. I have been meaning to go to one of the lates at the National Museum but have never actually managed it. The next one coming up is a Dino-themed night (see here for more info)
It is quite pricey - £10 for a ticket plus booking fee on top - but it looks like quite good fun (photos from their past nights are available on here). Easiest thing would be for everyone to get their own ticket.