The OP comment is not right.
If she hangs about in the hotel bar trying to pick up guys, then she is soliciting. (But note that is her breaking the law not you).
Meeting in the hotel lobby or hotel bar is legal. Paid for sex is legal. (But if you make some kind of show, you could piss off the hotel, and they do have discretion to ask a guest to leave. A bit of common sense is all that is needed)
Other have said this better than me - just saying it again as it does not help punters if bullshit gets posted and we don't all call it out as bullshit.