I just realized no one has posted this (or if they did, I missed it)...
Annual Greek Festival at St. Athanasius the Great, 735 Massachusetts Avenue, Arlington.
The tents are up, the grills are out. I've been for a couple years now. Spit-roasted lamb and pig, Greek specialties and pastries, and wine (in semi-dry Arlington, no less!). One of the better ones I've been to and well-attended.
David "Zeb" Cook