Chequers used to be the shop I visited frequently along with the long closed Zanadu further up at Pitt St behind the Hilton and to a lesser extend the Babylon at Market City ! But back then I was still a problem gambler going to Star City regularly and ringing up some serious credit card debts, I was very lucky to get out from that shit hole alive !!

Back to Chequers, in regards to the tips , lots of people actually carried the wallet with them into the massage room, if my memory is correct the clothes that you changed into should have two rather deep pocket.

Alternatively, if you know the ML and know how much money you need for the tips, then you simply put the right money in the pocket with you.

Otherwise. You can simply make a verbal promise to the ML that you will tip her $20, $50 or $100!
The ML will go to reception to add that tips to your bill and when you shower and changed and return the locker key to reception , you pay the money then. In Chinese or Hong Kong terms it's call:

代支！meaning pay on behalf !

Talking about tipping , first time I had FS with one of my favourite ML #18 at Zanadu , she wanted $200! and I paid it, and when I paid that at reception the Mamasan gave me a cheeky and funny look! I fucked her a few more times after that but I only paid $100 since !

BTW, some ML will follow you to the locker room and waited outside for you to get the cash, may be due to some dispute in the past!

I think wallet into the room will be the way to go if you have extras in your mind !

Keep it up brother , love to see The Lord Vader conquering the massage world in Sydney , close by and far far away........haha