My ex-husband used to drag me in to the Riviera casino in Las Vegas. I absolutely hated the place. If you feel strongly about this telemarketing issue and you have an account with Yelp, leave a negative review.
I would only consider that if they called. What I hate are those operations that hide their numbers. It was bad enough when they displayed out of service numbers. But its even worse when they use active numbers that have nothing to do with the caller in question.