Punk icons GBH entertained several generations of fans at the accomadating and fun Garden Grove, CA-based open-air Garden Amp venue on Friday night. In tow were several up-and-coming or established younger acts to keep an eye on and to help the Birmingham baddies celebrate the City Babys Revenge 40th Anniversary US Tour in style. The all-ages event was an almost pitch-perfect celebration of punk’s forever appeal and staying power.