I suppose it depends where you are. In Washington DC (where I live) there is a DC Nightowls group (http://nightowls.dcacm.org http://nightowls.dcacm.org) which

I suppose it depends where you are. In Washington DC (where I live) there is a DC Nightowls group (http://nightowls.dcacm.org http://nightowls.dcacm.org) which meet up at night for people who want to work. It's a nice community of people. Maybe your city has something similar? Or you could always start one. I also work late at my coworking space, sometimes there are other people, sometimes there aren't. I've definitely scheduled late night work sessions with fellow coders there though.