If you do hit negative variance, make sure to analyze your play and ensure that you stuck to your game plan. If so, then it's nothing unusual and just statistical volatility. Just make sure you don't over bet if on a downswing or it could kill your bankroll. Losing is a big part of the game...
I wouldn’t bank on getting a room comped with that kind of action. They see green chippers constantly so you won’t be big news. If they do like you, they’ll send down a host and then you can try to sweet talk them. However, I only see that happening at an off strip casino where your betting...