I've snorted some blow & smoked pot with sps in the past (always supplied by the ladies) & don't see much difference between doing this or drinking alcohol together. Mind you, this happened between 7-12 years ago at a time in my life where i lived every day like it was the last. If you read it up on John Belushi's final days, that was basically a lighter version of me when i'd come to Montreal, whether i saw sps or not.
I've also done ecstasy prior to a duo i once had, but the girls were unaware of it. I didn't realize at the time that if you're a male, that's the worse thing you can do prior to having sex. It tends to put your 'little friend' to sleep, if you know what i mean. I later found out from an sp i befriended that most guys she knew who did ecstasy prior to having sex would also take viagra in order to be able to have a hard-on. I didn't try it since i've never been big on ecstasy & haven't used it in nearly a decade.
I saw many sps after midnight back in those days, and half of them always had some illicit drugs to offer or sell me, and rarely (never?) did i ever refuse anything a pretty young lady offered me. Heck, i often called girls just to 'party' and didn't care if we had sex or not. These past few years, i'm mostly a morning or afternoon guy and i barely drink (a glass of red wine or a vodka/red bull) when with an sp. I prefer being as focused as much as possible. I also hate having to go to the bathroom during an 'encounter'. The less i drink, the better. Plus, i have a harder penis when i don't drink (which wasn't a problem when drinking at a younger age).
p.s. The title of this thread is kind of misleading if compared to the survey question. There's a big difference between 'drugging an sp' and offering her illegal substances during an encounter.