To celebrate the opening of the facility, Work to Ride will host the Philadelphia Arena Polo Championship on Saturday from 11 a.m to 5 p.m. — a slight twist on its annual Polo Classic event. The Polo Championship will feature two matches of arena polo, which is played indoors, features a different ball and has three players per team compared with four for outdoor polo. The event temporarily replaces the annual Polo Classic, which is typically held outside at Edgley Field in September. But he plans to bring back the Polo Classic in its full capacity next fall as part of the city's semiquincentennial celebration for America's 250th birthday. "We're hoping to make this an annual thing where folks continue to get to enjoy our event," Rosser said.