A "pledge drive" is when people are asked to give money or make a promise to donate money to support a particular cause or organization. Full definition
I turned it off halfway through and listened to the public radio pledge drive instead. (goodreads.com)
Maybe your passion is serving veterans, tutoring students, or organizing pledge drives. (realtormag.realtor.org)
«It's Populism» For several years, I was one of the local stars (God help the locals) of PBS pledge drives at a network affiliate in the southerly states of America. (writerunboxed.com)