Met a guy to have sex with or just met a guy?
Do you have any particular quesions about that, or do you just want to know if it's ever happened before?
I have not, but I know of women on LPSG who have become intimate with men they met here. I would never reveal private information shared with me, so that's as much as I'll say on the subject.
I wouldn't expect any of the women to reveal whom they have met and what precisely happened. A lot of people here are discreet for a variety of very good reasons.