Allyson Paige

Musicians “Rally for Ally”today at 5:30 p.m. at the Mystic Theatre, 23 Petaluma Blvd. N. Jesse Brewster, Volker Strifler, James Nash, Petty Theft and 20 others come together to perform and hold an auction to raise money for singer Allyson Paige, who was diagnosed with cancer in September. Suggested donation is $15-$30. and tickets are available at mystictheatre.com. For updated event information, visit allysonpaige.com.

The HMI Equestrian Challenge concludes Sunday, May 20, at Petaluma’s riverside Sonoma Horse Park, 7600 Lakeville Road, with hunting and jumping events starting at 8 a.m. The public is welcome to watch riders, trainers and horses from throughout northern California compete. Admission is free; flip-flops or high heels are not advisable. More information: (415) 518-2145.

The Lagunitas Beer Circus comes to town 1-6 p.m. Sunday, May 20, at Lagunitas Brewing Co., 1280 N. McDowell Blvd. For $40 ($25 designated drivers), you get aerial acts, clowns, music, burlesque, midway games and craft brews from throughout the region. Proceeds benefit the Petaluma Music Festival and Music In Schools. 21+ only. More info: 769-4495 or lagunitas.com.

Alice Medrich, author of “Sinfully Easy Delicious Desserts,” will speak at Copperfield’s Books at 2 p.m. Sunday, May 20, 149 Kentucky St. It’s free. More info: 762-0563, copperfieldsbooks.com.

Petaluma’s Active 20-30 group meets 6:30-8:30 p.m. Wednesday, May 23, at Brixx, 16 Kentucky St. The group of 20- to 39-year-olds meet to socialize and plan volunteer and fundraising projects. More info: 766-8162.

Thai Issan hosts karaoke 9 p.m.-12:30 a.m. Thursdays in its Ultra Lounge, 208 Petaluma Blvd. N. No cover charge. More info: 762-5966.

Support Petaluma Valley Rotary Club’s Bright Futures Initiatives by entering a nine-hole golf tournament at 3:30 Thursday, May 24, at Rooster Run Golf Course, 2301 E. Washington St. Stick around for a gala at 6 p.m. Tix are $85 golf and gala, $30 gala only. 21+ only. More info: 981-7363.

Tony Redhouse

Attend an old fashioned barn dance 5-9 p.m. Friday, May 25, at Green String Farm, 3571 Old Adobe Road, to benefit Heifer International, suitable for teens and older. Tickets are $30, with a chili dinner, beer, wine and easy-to-learn dances. More info: 875-3177.

Tony Redhouse, a Navajo musician, sound healer, spiritual teacher, Eagle/Hoop dancer and founder of Native American Yoga, will perform healing music at 7 p.m. Friday, May 25, at the Petaluma Historical Museum, 20 Fourth St. Tickets are $5, $3 seniors and children. More info: 778-4398 or petalumamuseum.com.

“Born Yesterday,” a romantic comedy about an ex-show girl who is tutored by a newspaper reporter, opens Friday, May 25, and runs through June 10 at the Cinnabar Theater, 3333 Petaluma Blvd. N. Performances are 8 p.m. Fridays and Saturdays, 2 p.m. Sundays. Tickets are $15-$25. More info: 763-8920 or cinnabartheater.org.