As the expression implies, a very warm/hot place. This effectively communicates that it's uncomfortably hot, just as a whorehouse would be from the droves of people who would show up for "dollar night."
Sam: Why is it so warm in here. Dinner will cost us $100 each; you'd think they can afford air conditioning!
Nora: Yeah, it's hot as a whore house on dollar night.
The opposite sex of a hotbird. Named after Jason. The hottest dillard of them all. SO hot he has his own slogan/nickname. He is the cutest sweetest funniest fliest nicest hot dillard in the whole world. A flair for punk and rockabilly and the Celtic ways. Wise beyond his years.
I gotta tell you it's been a long time, but I just got the hugest smile from some hot dillard at Walgreens. He was hella rubber necking me. So I smiled back and whispered a hi and a wink. I think we both turned bright red. That felt good. Guess I'm still hot.