Calling all parrotheads. It's THE summer tradition you've been part of for 28 years. After you've assembled the requisite tailgate party and are waiting for the show to start, try Jimmy's new online game, Margaritaville. It's a virtual island world with music, adventure and a "Margaritaville lifestyle." Tickets: $39.50-$139.50 includes parking and is subject to service charges.