Nice Tank Top, Mickey

Another day, another tank top!

Mickey Rourke met with friends, poolside at the Delano hotel in Miami Saturday where he and other celebs toasted the opening of the new restaurant Bianca.

Rourke donned a beenie to hide his newly-shaven head ... the actor got rid of his famous long locks Friday, seemingly in preparation for an upcoming role. The former Oscar nominee will play rugby star Gareth Thomas, who was known for his strong plays on the field and who eventually came out as gay.

Rourke has said of the Thomas: "It’s a film about a man who played rugby, who was so aggressive when he played — and he happened to be gay."

Rourke is said to have hired a trainer to get him in shape for the part. Thomas is 37 years old, so the 59-year-old has some work to do!