"Forever Plaid – Plaid Tidings" (Kenner)

Through Dec. 5, at Rivertown Repertory Theatre, 325 Minor St., (504) 468-7221. Filled with Christmas standards that have all been “Plaid-erized,” the boys are back to do their Christmas Special. At first they aren’t sure why they’ve returned, but a call from Rosemary Clooney lets them know that they’re needed to put a little harmony back in a discordant world.