From their event page: 

Join Fairmount Park Conservancy and DJ Valentin Flores of Dance Philly for a special edition of Bailar en FDR at the park’s new Gateway Plaza. Experience culture, meet new people, and discover a fun and enjoyable way to keep yourself fit by moving your feet. Hosted by Fairmount Park Conservancy, DJ Valentin Flores, and Dance Philly.

Tickets are for an hour dance lesson from 7–8 PM PLUS the social dance from 8–11 PM. The lesson is taught by an experienced instructor, who will accommodate all levels.

The Gateway Plaza in FDR Park is located at the corner of Broad and Pattison (more information on location and parking below). The new plaza serves as a pedestrian-friendly entryway to the park and features custom benches, bike racks, water misters, stormwater basins, a colorful six-foot-tall steel sign, native plantings, and more.