1. Be a high roller—for a few minutes
When you enter a casino and start playing for the first time, make your initial bets higher than what you would normally use as a minimum bet. The pit boss assumes that this is your usual betting pattern, and will use it to calculate your comp eligibility — that is, what kind of freebies the house might offer.
Not surprisingly, the hotel's generosity when it comes to meal and room discounts is a direct function of how much it thinks you're going to bet per hour. You can always settle into your more modest wagering habits as time goes by. The pit bosses rarely have time to check in on you later.