I think that game is Grateful Dead night. I don't know if you abhor ancient hippies and the younger wannabes, but they have a cover band pregame that's knows the repertoire and does an adequate job if you are drinking a beer. They have a tee shirt, too, if you buy your ticket through the organized event, but if you just like to listen to live music, you can hang at the Loft and look over the band on the CF plaza. For info on the sponsored event, go to the Nats promo page, I think.