What’s happening

Spokarnage Roller Derby Tournament Twenty-four teams will battle it out on two tracks for three days. Plus, beer gardens, vendors and special activities throughout the weekend. Half-hour bouts beginning at 4 p.m. Friday; regulation-length bouts on Saturday and Sunday; championship bout on Sunday afternoon. Spokane Convention Center, 334 W. Spokane Falls Blvd. $8-$25. (800) 325-SEAT.

Spokane Shock Arena Football Saturday at 7 p.m. vs. Cleveland Gladiators. Spokane Arena, 720 W. Mallon Ave. $14-$28. (509) 242-SHOCK.

Doll Show and Sale Hosted by the Spokane, Lilac City Doll Club. Antique, collectible and modern dolls, bears and doll accessories. Saturday, 10 a.m.-4 p.m., Spokane Community College, Lair, 1810 N. Greene St. $5/general, free/age 11 and younger. (509) 838-8487 or 328-5319.

Clothing Drive Fundraiser Rogers High School students are collecting old clothing, blankets, sheets, old rags, dish towels, shoes, purses, belts and stuffed animals. The items can be torn, stained or mismatched. Usable clothing and other items will be repurposed and sent to disaster areas in need; unusable clothes and items will be recycled into textile fibers. A portion of the proceeds will benefit Rogers Grad Night. Saturday, 10-11 a.m., Rogers High School, 1622 E. Wellesley Ave. Free. (509) 487-3462.

“A Wide-Open Town” Author and historian Jim Kershner will discuss Spokane’s more colorful history, including three of the city’s more interesting characters. Saturday, 2 p.m., Shadle Library, 2111 W. Wellesley Ave. Free. (509) 444-5390.

“Folk, Jazz, and Blues: Songs that Helped Americans through the Hard Times” Brad Keeler and Linda Parman will take you on a musical journey, introducing you to the music of Dust Bowl wanderers like Woody Guthrie, the urbane arrangements and witty lyrics of big city jazz and swing, and the comforting soul of country blues. Part of Humanities Washington’s “Hope in Hard Times” program sponsored by the Spokane County Library District. Saturday, 3 p.m., Fairfield Library, 305 E. Main St., Fairfield. Free. (509) 893-8320.

“Navigating ObamaCare” This free health forum, moderated by Doug Nadvornick, will feature a panel of experts who will discuss the changes the Affordable Care Act has brought. Possible topics include enrollments, pricing, Medicaid and what’s expected for the future of health care and health insurance. Tuesday, 6:30-8:30 p.m., Spokane City Hall, Council Chambers, 808 W. Spokane Falls Blvd. Free. (509) 328-5729.

Visiting Artist Faythe Levine Levine is a researcher, multimedia artist, curator, author and collector based in Milwaukee, Wis. She authored the book, “Sign Painters” and produced a 2013 documentary about the trade of traditional hand lettering in America. She gives three talks: Wednesday, 11:30 a.m., Spokane Falls Community College, Building 24, room 110; Wednesday, 6:30 p.m., Northwest Museum of Arts & Culture auditorium, 2316 W. First Ave.; and Thursday, noon-1 p.m. at EWU Art Department Auditorium, Cheney. All events are free. (509) 359-2898.

“Why Zebras Don’t Get Ulcers” Robert Sapolsky, a MacArthur “Genius” Fellow who teaches biology and neurology at Stanford University, will discuss his experiences and research on human stress. As he explains in his book “Why Zebras Don’t Get Ulcers,” our bodies’ stress response evolved to help us get out of short-term physical emergencies – if a lion is chasing you, you run. But such reactions, he points out, compromise long-term physical health in favor of immediate self-preservation. Unfortunately, when confronted with purely psychological stressors, such as troubleshooting the fax machine, modern humans turn on the same stress response. Thursday, 7 p.m., Martin Woldson Theater at The Fox, 1001 W. Sprague Ave. Free. (509) 359-6081.