tonight there is refresh, a bunch of designers / developers go for burgers and beer - http://refreshedinburgh.org/ I wont be able to make it tonight though.

next wednesday there is techmeetup, some talks + beer and pizza, then we go to the pub afterwards - http://techmeetup.co.uk/

through techmeetup its usually quite easy to find out about a lot of the other events that go on, edinburgh uni run a lot of events, there are side meetups like the lean startup meetings and functional programming meetup, and the usual python / ruby / java / linux user groups.