Been a hobbyist for years, first time in Vegas, pretty
girl dressed in nice top and jeans approaches and suggests
we go up to my room. Any scams going on here I should
be wary of?

Proceed with caution. Try googling Las Vegas trick roll.  

http://www.theeroticreview.com/discussion_boards/viewmsg.asp?MessageID=157747&boardID=3&page=#15774

Trick Rolls ladies who will rob steal drug you and who knows what else can happen if you dont do your homework and if you pick up ladies in the casinos.These women can be BEAUTIFUL and will literally scam you right under your nose.

artists, backstabbers, and grifters than in this city. I mean what are the Casino's? Just legitimate con artists. ("come in and win..Blah blah blah.) Much more likely you'll come in and lose all you have. So of course con artists are attracted to this town because they think they will come here and con the Casino's. They don't realize the Casino's have been running the con game lots longer and are better at it than anyone could possibly be. And if you do happen to be better than them, they will kick you out.