Possible Clues:

• Street-closing festival, perhaps
• Neighborhood get-together
• Olympic volleyball team?
• Neighborhood's outdoor get-together
• Political group focused on supplying schools with building toys?
• Gathering with lots of cheddar?
• Reason to close a neighborhood street, and a hint to the circled squares
• Neighborhood bash
• Neighborhood street-closing event
• Neighborly get-together