Common Market is where the hip young and old (mainly young) go to hang out. I went there with some friends for a wine tasting they had. It's always crowded, but the energy baits you into staying and you're always glad you did. There are some interesting people to see and meet, and that always makes for a lively conversation.
The only thing I've ever had there is the wine, which was great though. If I based this on atmosphere alone, it's 10 out of 10. Add the location and patrons and you've got yourself a neat hangout spot.