post-gazette.com — For the past decade, we were told, in relation to the bookings at the amphitheater in Burgettstown, that Pittsburgh is a great market for country and classic rock. Some people celebrated, others groaned. MAY: Rob Zombie/Megadeth (May 16), The Avett Brothers (May 20), Primus/Gogol Bordello/Dead Kenny G's (May 22), Gavin DeGraw/Colbie Caillat (May 29).