I’ve had loads of luck in the past. There’s a Thai shop in milsons point and I used to see this masseuse frequently and after a few visits, she would do a bit of TT and after a few more visits, we ended up f’cking on the table for no extra charge, while a proper massage was going on right next to us separated by a thin curtain. - unfortunately she’s gone back to Thailand. I’ve had luck in a few Thai shops in Ultimo, Broadway and in the city. - but this was all before COVID and I’ve not invested enough time to find new Talent yet.
A trick that works for me is to ask for a combination of hard massage with soft just for the bum/thigh area.. “soft massage” is sort of a key word for possible extras in Thai shops.. if the girls offer, they’ll get the hint.
Good luck.