They are the only band to perform at the festivals .
Starting in 1996 , American jam band Phish has hosted a series of festivals - ten in total , with attendance ranging from 35,000 to 85,000 .
Phish are the only jam band to perform at the festivals .
Starting in 1996 , American jam band Phish has hosted a series of festivals - ten in total , with attendance ranging from 35,000 to 85,000 .