If you live in Tempe, this should be your regular hangout. They have great drink specials all the time- but especially during happy hour. Their food is pretty good, and they have live music just about every night of the week. The crowd is eclectic, so you don't have to worry about being surrounded only by college students (unless you want to be).
I also noticed that the bartenders are very fast here, which scores major points. There's nothing more annoying than waiting 15 minutes for your drink to arrive, but that has never happened to me here.
There is no dress code here- you can wear whatever! It's a very casual neighborhood bar.