You shouldn't have any problem figuring out where the 2011 6th Avenue Summerfest, which puts a lot of emphasis on musical and other types of entertainment as well as giving vendors a chance to display their cultural and ethnic wares, is held. But, if you want a slightly more exact location, it starts on 23rd Street and goes to 33rd Street.
Along the way, which is set up midway-style, making it easy to navigate and see everything, you'll see different exhibitions and displays, including the usual food and merchandise ones that make New York street fairs so much fun. But, again, this particular festival does focus on providing multi-cultural and ethnic entertainment.
Festival hours are from 10:00 AM until 6:00 PM and admission and entertainment are free. So, bring the family out and enjoy the fun at the 2011 6th Avenue Summerfest.