EAST MARLBOROUGH — The classic story of young lovers caught between warring factions — West Side Story — has delighted audiences for nearly two generations and a fresh production of the classical musical will open this week at Unionville High School. Shows are Thursday March 12, Friday March 13 and Saturday March 14, all curtain times at 7:30 p.m. Tickets can be purchased in advance through www.showtix4u.com,...