"Nobody invests $40, $50, $60, $70 million in a pool just to get small returns," Jay said.
"When you see all these people checking in, especially the demographics 21-35, we know that they're coming to our pools and they're coming here to the cabanas, spending money on the daybed," Jay said. "It's all about spending money ... driving revenue to the hotel.
How much? Do the math.
"Just to come into these best pools, you're looking at $40-50 a person -- that's just to get in -- you don't have anywhere to sit or put your towels," Jay said. "So if you want a daybed or cabana, you could be looking at anywhere from $10,000 and below."
Some of the cabanas may be nicer than your living room and can run from $2,000 a day to as much as $15,000 on a holiday weekend.
Admission varies: The day we were there, getting into REHAB cost $50 for men and $30 for women. Daybeds start at $1,500.
But money can't buy everything, at least not for everyone. The line to enter the pools is often an hour or longer.
Once you're in, you're ready to sun, swim and even gamble. Where else can you find swim-up black jack? And under the waterfall?
ABC News' Kimberly Brown contributed to this report.