419 S. Dithridge St., Oakland
This is the one worth marking the calendar for — it rolls around every May. Conveniently located in central Oakland, the church-run festival offers a week's worth of Greek food (from baked goods and snacks, to full meals), as well as live music and outdoor seating. You can even order your food online for easy pick-up.
2nd: RibFest, Heinz Field, North Side
3rd: Little Italy Days, Liberty Avenue, Bloomfield