Camden Opera House (29 Elm St.) presents safely distanced 45-seats/one-set-only Windjammer Weekend concert by Nick Apollonio, Midcoast multi-instrumentalist folk musician and fine instrument maker. Tickets are $10 in advance (encouraged), $20 day-of, via camdenoperahouse.com and 236-3154. Doors open 7 p.m., safety protocols (face coverings required) in place.