Bright Lights, Big Space.
If you're in Penn Quarter and you want to get your oontz-oontz on, UltraBar is one of the few places to go. The entrance is deceptive, as it looks like you're walking into an old bank, but inside is quite expansive, with multiple floors and quite a bit of seating area. Drinks are standard here for most dance clubs (honestly I remember that they're not overpriced but not super cheap). Of course you'll find standard hip-hop/house/remixed club jams; I don't remember ever not liking the DJs during my trips to UltraBar. So if some simple drinks and lots of dancing is what you're looking for, this is the place.