I havent but I am friends with two providers (closer with one than the other). I will say this, the non porn stars (regular providers) are adamant on keeping their work separate from their personal life. Both prefer if they're not approached as it's intrusive.
This happened when I was on a date with one outside a restaurant (non transaction) guy clearly didn't know boundaries. He actually started a conversation with her while she gave one worded answers and no eye contact while she went from holding my hands to holding my arm. If the interaction went on for another 1 min I would've dragged her away instead of telling the guy anything. But he eventually got the hint very very very late. I think understanding body language and social cues is very important for people to understand to prevent anybody from being uncomfortable
And personally its something I wont do anyways.