Miller Outdoor Theatre Hosts ’70s Philly Soul Throwback Show

If asked to name a well-known and successful Soul/R&B record label of the ‘60s and ‘70s, most people would blurt out “Motown,” while others might go grittier with “Stax.” But it’s the third leg of that sonic stool—Philadelphia International—that often gets over looked. The label founded by producers/songwriters Kenny Gamble…