This weekend is what I think is one of the best street fairs in Astoria - the St. Antonio Abate Society of Castrofilippo Festival. It actually started on June 24th but goes until Sunday the 28th. It's on Ditmars Boulevard between 35th & 38th Streets, and will have all the guilty tasty things like zeppoles and fried oreos, not to mention sausage and peppers. If memory serves me correctly, this street fair has carnival-type games as well.
There are posters in the windows of many of the businesses that line Ditmars,which have the details. Enjoy!