Using Gowalla checkins to predict alcohol-related travel

Something that I thought was strange is that I usually go out drinking near work rather than near home, and then ride my bike or take the bus home afterwards. I also routinely walk more than a mile. The article seems to consider this uncommon, but it's common amongst my group of city-dwelling friends.

It would also be interesting to use this data to see how public transportation affects drinking. When I go drinking at a bar that's near the Green Line, which closes around 1:20am, I make sure to finish up and leave around 1 (unless the extra hour is really going to make a difference to me). When I go drinking near a bar that's near the Red Line, which is 24 hours, I rarely leave before closing time. Am I normal? Mining the data could tell me :)