Up early? Feel like shopping, or just browsing? The Mojosales Flea Market starts at 7 a.m. Sunday, Sept. 16, in Walnut Park, Fourth and D streets. The next two flea markets will also be in Walnut Park on Nov. 4 and Dec. 16. Vendors are welcome. E-mail mojosales@hotmail.com for a packet. Space rental is $25 to $30.

Do you play the ukulele? If so, join the Petaluma Ukulele Club’s monthly jam at 7 p.m., Monday, Sept. 17. The group meets at Petaluma Estates, 901 N. McDowell Blvd. For more information, join petaluke@yahoogroups.com or e-mail petaluke@comcast.net.

Free classes in Kundalini meditation and Shaktipat are offered by Elena Portacolone from 7 to 8 p.m. each Tuesday. The first class is Tuesday, Sept. 18. Call (510) 830-9309 or e-mail elena@trikashala.com to reserve a space in the introductory class. All classes are held at Keene Acupuncture in the McNear Building, 7 Fourth St., Suite 50.

Elim Lutheran Church presents the second in its Jazz in Sacred Spaces concerts with Music Serving the Word Ministries, which fuses faith and the arts. The free concert is from 7:30 to 9 p.m. Tuesday, Sept. 18, at the church, 504 Baker St. Donations are welcomed. Call 762-4018 or visit elimlutheran.com.

Massage therapy can be helpful in relieving some arthritis pain and mobility issues. Massage Envy holds a one-day fundraiser, “Healing Hands for Arthritis,” starting at 9 a.m. Wednesday, Sept. 19. Massage Envy will donate $10 from every therapeutic massage or facial to the Arthritis Foundation. Visit massageenvy.com to book an appointment.

Petaluma Village exploration meetings focus on how to support local senior services in Petaluma. The monthly brown bag lunch meetings are open to all and explore the need and ideas for a Petaluma, a community-based membership organization to support older adults to live active, connected lives in their own homes. This month’s meeting is at noon Wednesday, Sept. 19, at 951 Petaluma Blvd. South. Call 772-5132 or e-mail apgreen@sonic.net. For details, visit petalumavillagenetwork.wordpress.com.

Enjoy local entertainment? Why not try Pongo’s Live, Thursday evening performances with a variety of local performers. The fun starts at 6 p.m. Thursday, Sept. 20, at Pongo’s Kitchen & Tap at 701 Sonoma Mountain Parkway, Suite C8. Call 765-98900 or go to pongospetaluma.com.

To memoir writers, voice is a powerful aspect of the craft. Author Ianthe Brautigan discusses “Finding Your Voice on the Page” at a writer’s forum from 7 to 9 p.m. Thursday, Sept. 20, at the Petaluma Community Center, 320 N. McDowell Blvd. Brautigan will help explore the importance and effect of voice in varied types of memoir writing and look at different ways of discovering one’s voice. Contact thewritespot.us for details.

Meet Dr. Horatio Bixby III, a mad scientist with a problem: an experiment’s gone awry and he must lure his unsuspecting niece, Prunella, to his mansion . . . Join the in-house cast of KRAP radio in Eyesore, Wis., to learn what happens in this week’s episode of Weird Science Mystery Theatre, as performed by Petaluma Readers Theatre. The action starts at 8 p.m. Friday, Sept. 21, at the Petaluma Arts Center, 230 Lakeville St. Tickets are $12. Call 287-1766 or go to petalumareaderstheatre.com.

Desperate efforts to make ends meet result in a comic tangle of escapades in Cinnabar Theater’s production of playwright Dario Fo’s “We Won’t Pay! We Won’t Pay!” opening its run at 8 p.m. Friday, Sept. 21 at the Cinnabar, 3333 Petaluma Blvd. North. Directed by Laura Jorgensen and featuring Liz Jahren, Nathan Cummings, Sarah McKereghan, Samson Hood and Gary Grossman, the play runs through Oct. 7. Tickets are $15 to $25. Visit cinnabartheater.org or call 763-8920.

Bay Area jazz vocalist Elaine Lucia and her band perform at 7:30 p.m. Saturday, Sept. 22 at the Petaluma Arts Center. The concert will feature Lucia’s original compositions, songs that offer some modern American folk, a little indie pop and, of course, an infusion of jazz. Tickets are $15, and the center is at 230 Lakeville St. Call 762-5600 or go to petalumaartscenter.org.