It's the Fiesta Casino in North Las Vegas. Located on Rancho Road at Lake Mead Blvd.
See: http://www.fiestacasino.com/maps.html

(They call it Fiesta Rancho to distinguish it from Fiesta-Henderson, the x-Reserve Casino, located in Henderson, NV.)

The chip show is on the Friday & Saturday just prior to the Superbowl on Sunday.

See the Gaming Times info about the show at: http://www.gamingtimes.com/