By Maggie Gordon STAMFORD -- In the years since the city's South End has morphed from a neighborhood full of multi-family homes and factories with blue-collar families closely knit with their neighbors to a hub of sleek, luxury housing, many of the area's original resident have left. But this Saturday, a group of people who grew up playing on the streets that now lead to Harbor Point are hosting a reunion at Kosciuszko Park. "People are coming from all over -- from Milwaukee, Pennsylvania, South Carolina," said Roshawn Middleton, who grew up on Atlantic Street.