Canton's O'Donnell Square

Just behind the firehouse at the western edge of the square, St. Casimir's twin, gold-top domes tower over the neighborhood. Its 5 p.m. service on Sunday, known to locals as the "hangover" or "last chance" Mass, attracts a good bit younger crowd than its bright-and-early Sunday morning one. For some O'Donnell Square revelers, this is the final stop of the weekend.