I mostly need a lot to drink after a concert cause I’m so wiped out from the moshing and banging. The best is a Radler (beer and limonade mix) and for eating I prefer hotdogs ;)
Chilli cheese fries and a good burger, if i visit germany to see a show i would prob go for bratwürst or currywürst or a döner kebab ( a gyro as they are known in the states)