re: Hotel discount codes that you know of

Hilton MVP Program - Around a 15-20% discount

LINK

It says you have to be affiliated with an athletic program but I've used it a couple of times and never been asked. You can sign up for a USGA membership for $10 a year if you want to safeguard yourself.

I worked for Marriot and the hotels would ask for my discount card every time. They would actually go photocopy it.