JohnStone Reggae Band The D.C. reggae band performs as part of the weekly summer concert series in downtown Bethesda. 6 p.m. Veterans Park, Woodmont and Norfolk avenues, Bethesda. 301-215-6660. www.bethesda.org. Free.
“Clementine in the Lower 9” Forum Theatre performs Dan Dietz’s modern retelling of the Agamemnon myth, set in post-Katrina New Orleans. Opens Thursday at 8 p.m., continues Friday-Saturday at 8 p.m., Wednesday at 8 p.m. Through June 15. Round House Theatre, 8641 Colesville Rd., Silver Spring. 240-644-1100. www.roundhousetheatre.org. www.forum-theatre.com. $25, seniors $20, age 29 and younger $15; on Thursday and Friday, pay-what-you-can tickets will be available at the box office one hour before curtain.
“Ragtime” Kensington Arts Theatre mounts the musical about three groups of New Yorkers at the turn of the century, based on E.L. Doctorow’s novel. Friday-Saturday at 8:15 p.m. Closes Saturday. Kensington Town Hall, 3710 Mitchell St., Kensington. 206-888-6642. www.katonline.org. $20, seniors $17, students $15, Kensington residents $13.
“The Sikhs: A Heritage of Valour and Devotion” A photography exhibit by New Delhi-based photojournalist Sondeep Shankar shows the heritage and traditions of Indian Sikhs. Friday-Saturday 10 a.m.-4 p.m. Through May 31. Gandhi Memorial Center, 4748 Western Ave., Bethesda. 301-320-6871. www.gandhimemorialcenter.org. Free.
Rockville Hometown Holidays This Memorial Day weekend celebration features 30 bands on five stages, children’s activities and carnival rides, and a “Taste of Rockville.” Bands play Saturday 2:30-10 p.m. and Sunday 2-10 p.m. On Monday, the Rockville Concert Band and Chorus performs at 9 a.m., followed by a ceremony at 9:30 a.m. and parade at 10:30 a.m. Rockville Town Square, between Rockville Pike, East Middle Lane, North Washington Street and Beall Avenue, Rockville. 240-314-5000. www.rockvilletownsquare.com. www.facebook.com/rockvillehometownholidays. Free.
“Penguins’ Playground” Bob Brown Puppets turn the stage into the South Pole as part of the Tiny Tots at 10 series. 10 a.m. Glen Echo Park, Puppet Co. Playhouse, 7300 MacArthur Blvd., Glen Echo. 301-634-5380. www.thepuppetco.org. $5.
“Spank! The Fifty Shades Parody” A musical comedy starring Patrick Whalen and based on the best-selling romance novel “Fifty Shades of Grey” continues Thursday at 7 p.m., Friday-Saturday at 7 and 10 p.m. Doors open one hour before showtime. Closes Saturday. The Fillmore, 8656 Colesville Rd., Silver Spring. 301-960-9999. www.fillmoresilverspring.com. $29.50-$39.50.
Baltimore Symphony Orchestra Carlos Kalmar conducts the orchestra and pianist Jean-Philippe Collard in a performance of works by Narong Prangcharoen and Saint-Saens and selections from Prokofiev’s “Romeo and Juliet.” 8 p.m. Music Center at Strathmore, 5301 Tuckerman Lane, North Bethesda. 301-581-5100. www.strathmore.org. www.bsomusic.org. $31-$91.