Summer pool parties, sadly, are coming to an end. With kids back in school, friends and family in Northeast Ohio soon will turn attention to back-to-school events and other calendar-swamping activities that prevent leisurely gatherings around the grill, outdoor kitchen and backyard patio. Since you’ve spent all summer enjoying cannonballs from the diving board and icy-cold drinks from the cooler, there’s no reason not to go all-in during one of the last weekends of summer weather. Here are four themes your guests will enjoy: Show Your School Spirit Labor Day and the end of summer coincide with the start of football and other fall athletic seasons. Encourage your guests to show their colors by coming decked out in spirit, whether it’s the local high school, a college alma mater or just your favorite team. Break out the clothes, uniforms, flags and cheerleader outfits while promising a surprise for the guests…