If the problem was the heat, I feel like there was a simple solution to that. The more you win in a row, the more heat.
They could have set up with one computer-person and say 10 players. Each player should have a uniquely different playstyle. One might play 4-8 minutes at a time, starting low and gradually increasing bets. Another might just play 3-6 spins at a medium bet. Another might place high bets until they lose the first spin.
The computer-person could then sit for 60-180 minutes at a table, playing boringly just losing ordinarily. And then they could take turns joining the computer person to play. In between each visit, they could leave enough time for npcs to lose at the table, for the heat to disappear entirely. If no suckers had lost in between a visit, the computer-person could even signal “backoff” with say a particular bet.
They could probably hit vegas for about a week, come back a little while later with other clothes, hairstyles and makeovers and repeat.