This is an ice cream bar where they serve cocktail flavoured ice cream with real alcoholic content! I recommend the B52. They also have a cocktail (drink) buffet at a reasonable price that is much lower than the hotels' rates.
I think they are two branches: one is on the 7th floor of Central World Shopping mall and the other is at the Erawan, next to The Grand Hyatt Erawan hotel. Nearest sky train is Chidlom station.
Send your feedback or queries to firstname.lastname@example.org