From their event page: 

Join Fairmount Park Conservancy and musician Luke Carlos O’Reilly as we celebrate summer with a series of free family-friendly concerts in West Fairmount Park.

Gather with friends and family for an evening full of live jazz music, kid-friendly activity stations, and local food trucks – all set under the shaded canopy of the Parkside Edge*.

On each date, there will be three 30-45 minute performances, starting with MIC’d Up – a community-based initiative that connects Philadelphia DJs, producers, and musicians with School District students – followed by a rotating set of jazz artists (see below for full details). Please bring a lawn chair and/or blanket.

*Parkside Edge is located along Parkside Avenue, in between East and West Memorial Drives. It is also the site of the new Parkside Pop-Up Play Space, an all-ages play space developed by Fairmount Park Conservancy in partnership with Tiny WPA.