I second the recommendation for orgy at Sauna Mania (I have been three times) and R3 (I haven't been for years). Details from a recent visit and entry prices here: https://christianpfc.blogspot.com/20...-on-sauna.html
Now three entry prices:
280 (written as สองร้อยแปดสิบ=two hundred eighty) for Thai (price list doesn’t state nationality, but I tried reading it out to cashier to get in for the Thai price, and a Farang friend who can read Thai tried on another day, and both us were told this price is only for Thai nationals).
420 for Foreigners.
2000 (sic!) for over 50 years olds (Thai or foreigner).
And changed show times, now Mania Fri 20:30, R3 Sat Sun 20:30 show.