Big Rock Barn Burner Concert Post navigation < > with Mt. Joy, The Darcys and Girlfriend Material! October 12, 2018The Opera House Facebook Twitter Indie88 proudly welcomes Big Rock Barn Burner Concert featuring performances from Mt. Joy, The Darcys and Girlfriend Material on Friday, October 12th at The Opera House! Tickets are now available. Click here to purchase, proceeds go to Music Heals! Sign up for our Superfriends newsletter for concert ticket giveaways, pre-sales, new music and more awesome stuff.