One word:
Musicals
The scene:
Saturday night Game Night, one girl kicking a lot of trash in the game "Ticket to Ride."
Me: (pointing to the game board) Oh, there's New York. I think I'm going there this summer.
Gay #1: You're going to New York, again?
Me: Yeah, my sister...blah, blah, blah. And--I'm sooooo excited about seeing 9 to 5 the Musical.
Gay #1 (excited): What?! Are you serious?! I love that movie!! I'm totally going to go see that!
Everyone: (continues to talk about the awesomeness of said movie, Dolly Parton, and Broadway in general)
[later in the evening]
Me: Oh, look, I just went to Santa Fe. (bursting into song) Santa Fe, are you there?
Gay #2 (bursting into song): Do you swear you won't forget me.
Both: (continue singing that awesome song from the musical movie "Newsies".)
To summarize: Bursting into song is awesome, especially Broadway musicals, and gay guys tend to be more accepting of and willing to participate in this. I'm just saying...