Having been to the Stadium in November, I would say stay in town for a bevvy, there really isn't that much around the Metropolitana. We walked a fair way towards the ground, there is the odd bar and restaurant here and there but not a lot. A few tins for the journey would be advisable.
I came away thinking lovely stadium, access is actually pretty good, apart from it being a bit out of Madrid, but the Atletico fans are pretty upset that they don't have all the bars and restaurants they had when they were at El stadio Vicente Calderon.