That said, casinos routinely offer discounts/rebates on losses, but generally for their biggest players and large losses that are almost always negotiated in advance. Of course, anyone can ask for a loss rebate by contacting a casino host; it doesn't cost anything to inquire.
Casino staff can ask you to leave for any reason, including cheating and rowdy behavior. If casino staff orders you to leave, you must do what they say or face legal consequences. The casino owner can also prohibit you from returning to the property again in the future if you resist.