Is there a future for aging rock stars besides bingo on Sunday? Who should hang it up? Who still has the moves?

Reunion tours are all the rage anymore – just ask the artists-formerly-known-as-bands raking in the cash each summer from fans willing to fork it over to relive the glory of days gone by. The Police, The Who, Van Halen, Stone Temple Pilots and New Kids on the Block are just some of the most recent groups to bury the hatchet and climb back into the old tour bus (or several personal tour buses, as the case may be).