Went to Drai's Beach Club last week during the day and had a great time. The new rooftop pool is amazing. You have a great view of the Bellagio fountains and the rest of the strip. On that day it was extremely windy but the way the level is constructed the pool is shielded from wind so it was perfect! If I would have gone to any other strip pool that day the wind may have been able to ruin it.
Drinks are average strip prices but are tasty and aren't unnecessarily light on liquor. All in all I'd go back again. I had a great time in a clean place with good drinks!