Raj Mahal is the cheapest. You can still find some 8/10s here. Total cost for entry is under 4.5k.
IMO, Nightingale has the best girls. Lots of girls that are around 8/10 - with makeup

At Nightingale, depending on the girl's price, you will either pay 6.5k or 7.5k for entry.
The entry cost does not include the cost of drinks/tips that you pay in the bar before you negotiate entry with the girl/coatwala. Note that since all of these bars are basically pickup joints, the waiters/coatwala are generally pests. If you run into a laid-back/non-aggressive coatwala, get his name and try to sit at this table in the future.