What do you do in Vegas when you have a couple million dollars but you're too young to get into any casinos?
If you're NBA rookies Karl-Anthony Towns and D'Angelo Russell you spend your days doing some seriously frosty training cues from the sports king of Vegas ... Floyd Mayweather.
Towns and Russell -- the top picks in this year's draft -- took a break from the NBA summer league recently and visited Floyd at his TMT gym to grab some pointers on being a superstar pro athlete.
Mayweather did more than just talk to the pair of pups ... he brought them to SubZero Recovery -- the state of the art cryo-lab he uses to bounce back during training ... and actually put the guys in the freezer.
The Cryo sessions last 90 seconds to 3 minutes ... and according to the guys at SZR, it helps to enrich blood, expel toxins and other cool stuff that helps to heal the body.