I think you should drink while you're there. *captain obvious*
If you don't black out at least once you're doing it wrong. We spent 8 hours there on a cruise one time and went on a pub crawl. It was a lot of fun, but when the tour was over our guide left us in a bar and didn't tell us all how to get back to the boat. Get 15 people absolutely wasted and then send them on a scavenger hunt in a place they've never been, and you'll get the idea. At some point I ended up in one of the said nudie bars. Since most of the chicks that were in the group were drunk and voluntarily went up to the bar, they were happy to oblige with nudity themselves, although I'll say the staff wasn't exactly anything you'd want to check out...well I guess unless you're completely wasted.
I am still amazed that I made it back to the damn boat. I remember about 15 minutes of time over a 6 hour period. And let me tell you, being hung over on a boat of any kind is about as fun as holding a hot curling iron against your cock.
They gave us one of those t-shirts...you know the ones that say "I survived the key west pub crawl"; truer words were never on a t-shirt, ever.