We were all completely naked and sitting on towels

Wasn't a confrontation, but I was in a steam room at a tennis club/gym with my dad and uncle, and in comes John Travolta. I think this was when they were filming hairspray. Anyways we all sort of notice that it's him, and after a few minutes my uncle says, Mr. Travolta! and leans over to shake his hand. John Travolta's face got incredibly red like he was embarrassed, but he was real nice. He left after like 2 minutes though. Afterwards I noted that maybe he was uncomfortable, as we were all completely naked and sitting on towels, while he was wrapped fairly tightly in his.