I think your Mami just "big" you... Price did increase but i do not think its $3xxx per first two hours even you were going for tea dance. I went there last week with friends, total 3 people. Stayed around 3.5 hours, 1 set chivas(12), some food and the bill came $14xxx.
Actually, any C-hing know how do they charge after the first 2 hours?