I've been to the Whiskey a few times over the years, despite the fact that it is supposed to be a +25 bar. I find that girls usually bypass that restriction no-problemo, but they come down on the men a lot harder. They are also SERIOUS about the dress code, so not even nice sneakers will pass muster here.
My experiences here have been varied. Sometimes it truly did (and does) feel like everyone has a few years on me, and at other times I feel like I'm older than everyone there. The music varies depending on the DJ - in the past I've always enjoyed the mix of 80s and 90s with the top 40 hits. But when my friends and I decided to hit up the place for Halloween to check out the beautiful people, the music had gone downhill. Way downhill. I'm not sure that the DJ had even gotten the concept of danceable music. It started thinning out around 12, so obviously I was not the only person who noticed.
I like the bar side, where the music is toned down and the lights are turned up so you can see and hear the people you are talking to. The club side is cool too, with frosted glass and a "dance pit" along with a raised dance floor. There are usually tons of beautiful people writhing around on one of the many dance floors, so if that's what you're looking for, it's as good a place as any to score.