Social Calendar

11th Annual Cobra Polo Classic - Enjoy a day of gourmet food and beverages, a silent auction, beautiful hats, a cigar and whiskey tent and a great polo match. Proceeds support Ronald McDonald House Charities of Spokane. Today, noon-4 p.m., Spokane Polo Club, 10800 U.S. Highway 2, Airway Heights. $200/person. (509) 838-8511.

Grandparents’ Day - Tell us why your grandparent deserves to be Grandparent of the Year. There will be lunch, a silent auction and entertainment by magician/comedian Louie Foxx. Proceeds benefit Greater Spokane County Meals on Wheels. Today, 1 p.m., CenterPlace, 2426 N. Discovery Place, Spokane Valley. $15/general, free/age 10 and younger. (509) 924-6976.

Dirty Martinis for Clean Water - Come enjoy the drinks, appetizers, a silent auction, live music, and the presentation of the annual Mike Chappell River Hero award. Proceeds support a fishable and swimmable Spokane River. Friday, 6-11 p.m., Riverside Place, 1108 W. Riverside Ave. $45 online; $50 at the door. (509) 464-7621.

Bike MS: Cycle the Silver Valley - Two-day journey on a rails-to-trails path with meals, amenities, fully stocked rest stops and festivities. A $75 registration fee and a minimum of $250 in fundraising required to participate. Funds support research, programs and services for nearly 15,000 people living with multiple sclerosis across the Northwest. Saturday-Sept. 20, Silver Mountain Resort, 610 Bunker Ave., Kellogg. (866) 344-2675.

Spokane Symphony Opening Weekend Dinner - Sip champagne and enjoy dinner on Saturday prior to the 8 p.m. concert or Sept. 20 following the 3 p.m. matinee. Both Classics concerts at Martin Woldson Theater at the Fox. Benefits the Spokane Symphony. 5 p.m., Champagne reception, 5:30 p.m., dinner by executive chef Mark Miskiewicz. Saturday-Sept. 20, Spokane Club, Georgian Room, 1002 W. Riverside Ave. $75/dinner only. (509) 838-8511.

Fiesta Spokane Run 5K/10K - Chip-timed race will start at the Gondola Meadow, running on the Centennial Trail, through Gonzaga University’s campus and finishing at the Heritage Festival. Walkers are welcome to register for the 5K walk. All proceeds will benefit the Latino Hope Foundation Scholarship Fund. Saturday, 9 a.m., Riverfront Park, 507 N. Howard St. $30/5K, $45/10K. (509) 625-6601.

A Night of Improv Comedy - Proceeds go to the Green Bluff Grange Scholarship Program. Saturday, 7 p.m., Greenbluff Grange Hall, Old Orchard Theatre, 9809 E. Greenbluff Road. $10. (509) 863-3337.