From the Heavens to Las Vegas
The Guardians have come to Earth to visit - a planet Iason certainly has connections to. One of which is his partial ownership of a casino, and through it, his casual friendship with Donald Trump.

Once people got past that particular news, he called The Donald;s secretary, and had reservations made. Everyone has luxury rooms, things are set to Red will be treated as a guest rather than a pet, an account is set up so people can gamble if they wish, and everyone has a number they can call to have reservations for meals, shows, whatever else they'd like made for them.

Red is required to give up any and all weapons, of course - as is everyone else, and a personal attendant with a luxury cart is gotten for Red so there's no worries about his tail getting stepped on in crowded floors. Iason makes sure everyone knows the rules, and has a quarter million dollars put into the collective account to cover food, entertainment, gambling and the rest.