"Pile into Rockpile One of Billings' most popular hangouts, Rockpile invites you to "Pile In and Rock Out;" how can you say no to that? Opened in 2002, Rockpile is a great place to catch a game while you tug on one of the 12 draft handles. Visit for daily Happy Hour specials, $1 Pabst Blue Ribbon on Mondays, $2 Bloody Mary on Saturday, and all-day Happy Hour on Sunday."