I go to the gym late at night, usually get there @ 1AM but its usually between midnight - 2AM after I've had a nice sized dinner and hung out with one of my friends for a while to relax.
I need the leg press all to myself the past few months on my quest to leg press 1,000 pounds 1,000 times within 100 minutes time. More than 2/3 of the way there and it takes me just under an hour to get @ 700 reps done. I want some people there to witness me achieving that goal though when I do it, so I should probably start going to the gym a little earlier.