Damn right, if any potential housemates said to me, as one of the first things "Let's go for a pint", they would choice number 1. My old house mate used to shout PUB from somewhere around the house and we'd both be stood at the front door within seconds. That's the kind of house mate you need.
Good luck dude, I know how bad it can be looking for somewhere to live (nearly as bad as looking for a job). Which bit of London you after? I know a few musicial types north side of the river.