This is a great thread idea!
Well San Ling in swiss cottage is usually a good bet
, though careful they really want to push for £70-80 for fs at the end and £60 for b2b. I try to stick to the £20, £40, £60 for hr, b2b, FS.
Pre lock down Akos in Edgeware had a good chance of fs/bj at the end depending on who you got, though I have to say after the lockdown it seems no one offers fs anymore.
Natural ways in Finchley used to have some girls offer fs though I haven't tried them in a few years now so no idea what they are like now, they used to be a chinese run place but I hear its now an EE run place so no idea what they're like now.
Ive had fs/bj at Sala Thai in Hendon as well before pre lock down but I have to say the girls there are charging too much and are quite pushy, they get upset if you don't agree to extras which has been off putting for me.