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The event, sponsored by the Barge Canal Optimist Club, runs from 9 a.m. to noon Saturday in the YMCA, 19 East Ave. Other sessions are scheduled from 6 to 8 p.m. Monday, Tuesday and next Wednesday. Admission is $1.

Across the street, the Historic Palace Theater is showing “The Rocky Horror Picture Show” at 10 p.m. Friday and Saturday. ► Friday also is the night for trick-or-treating at 30 city businesses downtown, from 5 to 7 p.m., in conjunction with the official city Halloween party at City Hall.