I got to spend about 45 minutes at the 2Up in Denver today. There were about a dozen very nice DMD pins there, mostly modern Sterns like X-men and AC/DC, but I was delighted to see a Circus Voltaire and an Attack from Mars. Nothing really vintage, which is somewhat ironic as most of the place is taken up with 1980s video games like Ms. Pac-Man and Galaga.
The pins I played were flawless. I spent most of my time between CV and AFM, and both were smooth as silk (although the AFM needs to be leveled as it was nearly impossible to cradle the ball with the left flipper).
Environment-wise it's a bar with no food, so definitely not a family place (it's right next to an adult book store!). We were there in the late afternoon and there weren't very many people there, but those that were there seemed to be having fun. There was a very capable-looking bouncer at the front door checking IDs.
I had a blast playing such well cared for machines and will definitely return. I also want to check out their sister place, the 1Up, at some point in the near future.