1) You might be able to get away with a few of them at Harrahs. They seem to take the $5 chips from the strip casinos at the cage. I tried this when I gave them an IP chip and said "since you own them can you save me a trip" and they said sure, I pushed my luck to Trop and then Monte Carlo and the lady took them all.

Worse case they can say is NO, then you make the rounds.