A suggestion for Metro riders, though I'm guessing most of us in the neighborhood already know this: you don't need to wait for the gates to close again before swiping your Smartrip or fare card. It happens all the time at the Columbia Heights Metro, and it drives me nuts. Today a couple of college-aged girls in front of me were doing it, and when I said, perfectly nicely, "you know, you don't have to wait for it to close" they gave me nasty looks. Some people enjoy standing around for no reason, I guess.
Of course, the only time you do need to wait is at the big handicap gates.
Although at least people have mostly been good about standing right and walking left.
Just a tip.