If you're going to be downtown on Saturday, March 14th, have a good time, relax, kick your heels up and do a jig, but don't drive.  Save yourself parking fees and cab fares and take the free trolley that will be cruising up and down Michigan Avenue.  With the streets teeming with partiers, wanna be leprecans, and maybe a troll or two, don't push your luck, even if you're Irish.  Use the trolleys, they're free!!  Trolleys operate from 10:00 am to 6:00 pm.