Green Day will be playing a secret show this Thursday, August 11 at the Tiki Bar at 1700 Placentia inÂ Costa Mesa, CA. Doors open at 8pm. This is a benefit show to raise money for theÂ Cystic Fibrosis Foundation. Tickets are $20 and can only be purchased at the door. Camera and Cell Phones will not be allowed in the venue and the show is 21 and over.