When you guys talk about lucky dip with MLs what sort of strike rate you reckon you are getting FS from?

I don't really see it being the challenge everyone makes it out to be - at the moment off my rough calculations i'd say from 18 different ML 13 of them have provided FS as an extra and all have been on a first visit and not required any real groundwork. And of the 5 that didn't one was the receptionist who upfront said she doesn't FS but she was cute so i figured whatever - and it was only my second time going to a massage place at that stage.