Because when everyone hangs out somewhere, those awkward conversations—just like the ones you end up having in the middle of Walmart when you bump into someone you barely know—are inevitable.
"What I really want is to hang out where I hung out with my friends in college," muses Randall Munroe in the mouse-over of today's XKCD. "But have all my older relatives there too." Ain't that the truth. [XKCD]