After an original Oct. 20 show date that had to be rescheduled, alt-rock powerhouse Foo Fighters performed at Power Balance Pavilion on Tuesday night for about 10,000 fans. Opening the show was fantastic L.A. punk band The Bronx, playing as their alter-ego Mariachi El Bronx, which is less a gimmick than you might think. What started as a lark for the punk band has grown into a love that has seen the band release two mariachi albums and gain a following, and, yes, they stay true to the authentic mariachi style of music as well as wear black charro suits. The band performs in a variety of ways, sometimes incorporating mariachi into their punk set, sometimes performing as a punk band and m