“Mighty John,” afternoon radio announcer on WWMJ FM, will be spinning the oldies at a rock ‘n’ roll oldies dance from 9 p.m. to midnight Friday, April 13, at the Bangor Civic Center. Proceeds will go to the Ronald McDonald House in Bangor, which is planning an expansion this year. Tickets for the dance are available at the Civic Center box office and can be ordered by phone at 941-9711.