I wouldn't go to 36 casinos
just to get extra entries.
To qualify for the promo you only need 2 locales (AC and LAS, say).
The number of prizes they offer is IMHO
small relative to the effort to go to get them.
Several years ago they had a "visit lots of venues" promo, but you got RCs
upfront.
PS: You have just two months to do it all.