I went to the 1100pm show last night. They have a second show at 1230am. Browsing the drink menu the prices were:
Soft drinks, juices, tea and coffee - 140 baht
Beer - 160 to 170 baht. Tower of beer 500 baht
Cocktails - 240 baht
Spirits including mixer - 140 baht for Sangsom, Pipers, Gin etc - 200 baht for Johnnie Walker Black, Jack Daniels.
Wine - 150 baht per glass.
Bottles - 1200 for Blend up to 3000 for Black and 3500 for Jack Daniels.