I've read posts on here about how using your TR card starts a gaming day at CET and MGM and will hurt your comp offers if you don't gamble but just stop into the casino and swipe your card for something. What doesn't start a gaming day at either CET or MGM? Does using the seven star or diamond lounge start one or how about using priority valet or priority lines for buffets? I plan to have some extended stays in Vegas but probably won't stay in any casino. I'd like to know if I can use any of my tier benefits without affecting my future offers.