Wow, so those folks who spent a bunch of time with you basically didn't get paid for that.If I remember correctly...if it's free or comped these assholes don't tip. I think it was WBG they had their almost $200 tab comped and they didn't tip out the servers. They are entitled and socially inept hillbillies at the same time.
I remember once Howard Stern in an interview said even if he just got a cup of coffee somewhere, he'd tip $20 (and like $100 for lunch) no matter if the service was terrible (this was like 20 years ago) because he didn't want to see a story about how he was a cheapskate and didn't tip. He thought anyone with money who didn't tip was a jackass.
I agree with that sentiment. If you can afford to go, you can afford to tip decently in my book.