Dr. Rock and the Rollers, a self-described “good-time, rock ‘n’ roll ‘50s/’60s band” featuring Darry Hood, will appear on the Courthouse Plaza at 7 p.m. Friday as part of Entertainment on the Plaza series. Dr. Rock and the Rollers have played at the Hancock County Public Library, the James Dean Festival, the Knightstown Summer Car Show, the New Castle Arts Park Festival and at class reunions throughout central Indiana. Attendees are invited to bring lawn chairs and enjoy this free concert sponsored by Greenfield Banking Co.

It’s hard to capture the Indiana Black Expo, which opens today and runs through July 19, in a single paragraph because of the extensive variety and number of events associated with this festival. Food, speakers, entertainment, a job fair, a film festival, an education conference, a leadership summit, not to mention nightly music with headliners such as Patti LaBelle, the Isley Brothers and El LeBarge are all a part of this, the largest single cultural event in the U.S. Visit indianablackexpo.com/summercelebration for a complete listing of events.

Conner Prairie’s Symphony on the Prairie, at 13400 N. Allisonville Road in Fishers, will feature a symphonic rock tribute to the music of Journey with guest conductor Brent Havens. Song selections include “Open Arms,” “Any Way You Want It” and “Don’t Stop Believin’” at 8 p.m. Friday and Saturday. Gates open at 6 p.m., and fireworks will follow the performance. Visit connerprairie.org for admission information.

This year’s annual Treasure Hunt, 9 a.m. to 3 p.m. Saturday, features an antiques market at Indiana Landmarks’ campus at 1201 Central Ave. in Indianapolis, and more than 30 yard sales throughout the Old Northside. This event includes food trucks, ice cream, entertainment, antiques, collectibles, and architectural salvage and demonstration booths. Visit Treasure Hunt on Facebook for more information.