It’s time once again for the D.C. Idiotarod, that time honored race of costumed drunken loons pulling shopping carts through the streets of D.C. This year’s race is happening tomorrow, Saturday, March 8, at 2:30 p.m. If you haven’t formed a team yet, it’s technically too late, but you might just still have time to convince a group of your friends to dress up like superheroes, characters from a 1980s TV show, or professional…