River, which is located in the former home of the notorious Welcome Inn, is unlike any other bar in Denver. Part art gallery, it often hosts tents with artist pop-ups out front, as well as food trucks and vendors perched around the building. Inside, you can get down on the dance floor, listen to live music, play a game of checkers, sit on a couch and ponder life with coffee or beer in hand, or wander around and check out the rotating art.