I had a few drinks here on a few different occasions. I did NOT experience it as a "club" (rope lines and private rooms? c'mon).
PROS: Location. It's the only "bar" in this high-traffic area of the Mirage. House wine digestible. Friends said martini was excellent. The staff were nice and professional. Decor. Good for a drink and convo if you are stuck in the Mirage, and then move on.
CONS: Waay overpriced. Like seriously. Bottle beer selection limited. Personally, I prefer the bar at Stack, but that is a different experience and doesn't have the same hours.