Nice Atmosphere, if snooty. I asked the mincing maitre for a drink when I sat down and waited an interminably parched 10mins or so before I finally wet my whistle- torture!
Depending on the day I've had really good experiences and not so great experiences at Thai Lounge. However, I will say that their core offering of Thai food is just as good as the Royal Thai Gardens and a bit cheaper.
During the week they have a lunch menu that isn't really up to much, and I wouldn't recommend it.