Memphis Area Transit Authority and Mid-South Food Bank are holding the second annual “Stuff a MATA Bus” food drive Wednesday, Sept. 26, from 8 a.m. to 5 p.m. at Poplar Plaza Shopping Center at Poplar Avenue and Highland Street. Call 527-0841 or 722-7136 for a list of the most-needed items.

BIG for Memphis will host Memphis Mayor A C Wharton Jr. Wednesday, Sept. 26, from 10:15 a.m. to 11:30 a.m. at Phelps Security, 4932 Park Ave. BIG brings together Memphis Police Department colonels and business leaders to impact the community. Cost is free. R.S.V.P. to billy.garrett@phelpssecurity.com.

Methodist North Hospital will hold a free hip- and knee-replacement class Wednesday, Sept. 26, from 11 a.m. to noon at the hospital’s Total Joint Center, 3960 New Covington Pike. R.S.V.P. to 516-5639.

Rotary Club of Memphis East will meet Wednesday, Sept. 26, at noon at the Racquet Club of Memphis, 5111 Sanderlin Drive. Chris Wallace of the Memphis Grizzlies will speak. Cost is $17. R.S.V.P. to Lee Hughes at lmhughes@bellsouth.net.

Kiwanis Club of Memphis will meet Wednesday, Sept. 26, from noon to 1 p.m. at The Peabody hotel, 149 Union Ave. Becky Williamson of MLGW will discuss alternative energy. Cost is $25 for nonmembers.

The Greater Memphis Chamber Small Business Council will hold a Race to the Top breakfast meeting Thursday, Sept. 27, from 7:30 a.m. to 9:30 a.m. at Holiday Inn University of Memphis, 3700 Central Ave. The topic is “Pacesetters: Small Businesses That Made it Big.” Cost is $25 for members and $30 for nonmembers. Register at events.memphischamber.com.

The Memphis Research and Innovation Expo, showcasing global advances being made at The University of Memphis and at local research-oriented companies, will be held Thursday, Sept. 27, from 9 a.m. to 3 p.m. at the university’s FedEx Institute of Technology, 365 Innovation Drive. Retired U.S. Army four-star Gen. Stan McChrystal will speak. Visit memphis.edu/fedex or call 678-5105.

Sales & Marketing Society of the Mid-South will hold a roundtable with Tim Nicholson, principal for Bigfish LLC, titled “Building Your Personal Brand” Thursday, Sept. 27. from 7:30 a.m. to 8:30 a.m. at Panera Bread, 4530 Poplar Ave., suite 101. Prepaid tickets are $10 for members and $15 for nonmembers; tickets at the door are $20. Visit sms-midsouth.org.