If I had to choose a favorite bar in downtown Vegas, DCR would be it. Unique cocktails that you won't find anywhere else which change often with a few favorites available, Absinthe drinks, some craft beers, and your standard well drinks.
The entrance is hard to find. It's funny to see people who have never been here figure out how to enter, cool bathrooms where it gives the illusion people can see you on the toilet (they can't, I've tested it out with my friend), a small, intimate, sexy, dark lounge atmosphere with a DJ usually playing house music. It's a good spot for locals and your out-of-town friends.
Tip: Bring a jacket. It's always cold here!