I always have to laugh at the casinos that refuse to give out a few extra cards/keys (if any). It seems like such an inexpensive way to make a customer happy, but they would rather act like you're asking for the world. Maybe it's a good thing they all didn't give you a bunch of cards - you might not have been able to carry all of them home
Going to a bowling tournament in Vegas huh? Wonder if where you're staying they'll have a key especially for that event? It sure wouldn't be the first time.
Have fun at the tournament!
Jim