I've only stopped by here during the day around 1-2pm. I wanted to explore what was around City Center area so I came over to the Cosmo along the way. I remembered a friend highly recommending to come here if I wanted a good drink without all the "crazy" club like atmosphere. I came in from the upper level so I was already at the very top where the bar. I sat down and someone helped me. She seemed like she was in training but she was very nice and checked my ID and got my order. I forgot the name of the drink I got but it was delicious. Most of the items on their drink menu sounds really good anyways. Atmosphere was pretty calm and nice with just a few folks at the bar near me and bartenders chatting it up with them. I'd definitely come back again to grab another drink and maybe explore what it's like on a busy night. However i can't imagine it getting "crazier...although Marquee is just next door to them.