Concertgoer (noun)

1. A person who regularly attends concerts.
2. A person who is present at a concert.

Origin:

Concert + -goer.

Examples:

1. The concertgoer was thrilled to hear her favorite band perform live.
2. The concertgoers were a diverse group of people of all ages.
3. Concertgoers are encouraged to arrive early to get the best seats.
4. The concertgoer was impressed by the musicianship of the band.
5. Many concertgoers buy merchandise from the band after the concert.