I never once spent the entire night in my lab, even in grad school. But if I had no car then it wasn't a problem as I lived only like 15 minutes walk from work. Now it's close to 30 miles and the buses don't go all the way there this late at night (and I wouldn't want to ride them even if they did).
And also because I thought I could walk faster than a stroll in my big shit-kicking (literally as I stepped in some jerkoff's dog's crap this morning) cowboy boots across the traceur's dream that is downtown, I pulled a muscle in my front lower left leg, and now I'm a gimp.