• The Rotary Club of Oro Valley meets. Details: 7 a.m.; Oro Valley Country Club, 300 W. Greenock Dr.; Loriand@dakotacom.net.

• The Rotary Club of SaddleBrooke meets for lunch and a short program. Details: 11:30 a.m.; SaddleBrooke Country Club, 64485 E. SaddleBrooke Blvd.; $15; agbw@msn.com.

• The Desert Kiwanis Club meets. Details: noon-1:30 p.m.; Village Inn, 6251 N. Oracle Rd.; smrichards02@comcast.net.

• The Marana Optimist Club meets. Details: 6 p.m.; Golden Corral Buffet & Grill, 6865 N. Thornydale Rd., #932; free; 591-2979.

Friday, March 23

• The Marana Chamber of Commerce holds Collaborative Leadership Forums: Social Media: You, Your Employees & the National Labor Relations Board. Details: 8-10 a.m.; Northwest YMCA, 7770 N. Shannon Rd.; free; 682-4314.

Saturday, March 24

• The Joel D. Valdez Main Library offers an Information Power for Small Business Workshop. Details: 10:15-11:45 a.m.; 101 N. Stone Ave.; free but registration required; 791-4010.

Sunday, March 25

• Heritage Highlands, the Dove Mountain Civic Group, and the Southern Arizona Regional Solar Partnership host a Solar Presentation and Neighborhood Tour. Details: 1-4 p.m.; Heritage Highlands Ballroom, 4949B W. Heritage Club Blvd.; free; 744-5991.

Tuesday, March 27

• The Rotary Club of Marana meets. Details: 7 a.m.; Nana’s Kitchen, 8225 N. Courtney Page Way; 395-2508 or www.maranarotary.org.

• The Marana Chamber of Commerce holds its Fourth Tuesday Mixer. Details: 5:30-7:30 p.m.; Chili’s Grill & Bar, 5975 W. Arizona Pavilions Dr.; free; 682-4314.

Wednesday, March 28

• The Kiwanis Club of Oro Valley meets. Details: 6:45 a.m.; Fairfield Inn & Suites, 10150 N. Oracle Rd.

• The Marana Chamber of Commerce holds a Legislative & Economic Development Briefing with guest speaker Zoe Richmond, Union Pacific Railroad Director of Public Affairs. Details: 7:30-9 a.m.; Marana Operations Center, 5100 W. Ina Rd.; free; 682-4314.

• The Oro Valley Optimist Club meets. Details: 11:30 a.m.-1 p.m.; The Loop Restaurant, 10180 N. Oracle Rd.; kathicuvelier@gmail.com.

Thursday, March 29

• The Northern Pima County Chamber of Commerce holds its Monthly Networking Breakfast. Details: 6:45-8:15 a.m.; Oro Valley Country Club, 300 W. Greenock Dr.; $30, $20 members; 297-2191.

• The Marana Chamber of Commerce holds its monthly luncheon. Details: 11:15 a.m.; Heritage Highlands at Dove Mountain, 4949 W. Heritage Club Blvd.; $30, $25; 682-4314.

Saturday, March 31

• The Northern Pima County Chamber of Commerce holds its Hit the Trail! Hike and Breakfast. Details: 7-11 a.m., hikes start at 7, 8, or 9 a.m.; breakfast at 10 a.m.; Catalina State Park, 11570 N. Oracle Rd.; $25 or $40/couple; 297-2191.