The awesome ancient_youth just informed me that my beloved Flogging Molly will be playing at Shamrock Fest this year. I've already bought my tickets-- who else wants to come? :D
That being said, this may be how I end up getting in the Halloween Spirit for that weekend's events. ;) The basic summary is a whole bunch of people dress up as zombies, meet in D.C. at 6 pm, dance the Thriller dance, and then shamble through the streets. The potential for awesomeness is high.