Your suppliers confirm is those Thai Ah Peks or Uncles.
That's why bring you go to The Exotica G-Club whack your entertainment account gao gao 555!
Younger guys under 40yo will not like The Exotica G-Club.
They'll prefer Monte Carlo, Sherbet, Piano Forte, The Pent, The Resort, The Villa, The PIMP, etc.
Along with Pegasus, the Exotica G-Club are the most expensive G-Clubs in Bangkok and am not surprise your bill is a killer 555!
Lady Drinks in G-Clubs are not actual drinks but a fee system based on time blocks.
1st hour starts with 2-3 Lady Drinks and subsequent 1 Lady Drink per 45min block.
As for why the bill is so expensive this is where I can only know if I see the bill and break down for you. Post it here lah.

Along the way surely some guys order some other shit like cocktails, food, shisa, etc.
Legitimate G-Clubs will not any how overcharge.
It is because sometimes people like to hao lian or drunk liao any how order crap lah then kpkb sales rep or G-Club rip them off!

Go G-Club is must prepare to spend if not stay in hotel room watch G-Club videos on youtube and pcc.
If you're non-member a bucket of ice also costs THB100 leh!
You can read my signature link below for more G-Club info.
Lazy to post stuff that I've mentioned numerous times before.
Cheers.