MUSKEGON — The Michigan Irish Music Festival is having a party to celebrate its 15th anniversary called Ar Scoona. The festival will open the pub tent at Heritage Landing on Thursday, September 11th, from 5pm – 11pm, for Muskegon Ar Scoona, which means “On Tap” in Gaelic. The Ar Scoona will feature live entertainment with Seamus Kennedy, Crossbow, Moxie, and Socks in the…