A gay man at an old folks bingo place???
No, it wasn't rude of you to act that way. He threw out the line, trolled and when there wasn't any action, he kept cultivating you. You were just replying in kind and when it came down to the final dance, he didn't get you and was obviously bent out of shape over it (probably embarrassed too but it's HIS problem - not yours). Comes with the territory.
Gay people make distinctions too and just because there is ONE other gay man in the room it doesn't mean he is going to go home with the other gay guy. My only concern is when gay people start going to old folks bingo games to do their trolling.
Must be a bitch to be gay sometimes. I guess