I've always known I was singing to the ladies - the guys could care less. They were there hoping to get laid, drink booze, maybe watch a football game on the big screen, but music - NAH! The ladies, they wanted to party hearty all night long. They wanted to drink, dance, have fun, and they loved the music.
Now, maybe the ladies were just being nice to an old man.
I'll take that! Additionally, the ladies were the ones shoving the 10s and 20s in the tip jar, while the guys might thrown in a couple ones at best. When I fill in for a friend at a local restaurant, it's the same way. Gotta sing to the ladies if you want to make a good living in this biz.