From Longman Dictionary of Contemporary Englishconcertgoercon‧cert‧go‧er /ˈkɒnsətˌɡəʊə $ ˈkɑːnsərtˌɡoʊər/ noun [countable] APMsomeone who often goes to concerts, or someone who is at a particular concert
Examples from the Corpus
concertgoer• San Diego police took 21 Metallica concertgoers to a detox center and eight others were arrested for public drunkenness.• Ads for her current tour have suggested that concertgoers bring canned food for local food banks but specify vegetarian food only. 