Bon Jovi played a surprise five-song set in Nashville on Friday, June 7. The intimate performance celebrated the grand opening of JBJ’s, the new rooftop bar and restaurant owned by Jon Bon Jovi. It also came on the day Bon Jovi released their sixteenth studio album, Forever. The show was notable considering the lingering uncertainty surrounding Jon Bon Jovi’s voice. The singer underwent vocal surgery in 2022 and has been enduring a long road to recovery ever since. The frontman recently confirmed he’ll be unable to tour in support of his new album, noting that he’s “more than capable of singin…