woodsmen saidNYT: Instead of becoming waiters, as cliché would have it, actors and artists are hitting the road as Uber and Lyft drivers when work is scarce.
Taxi driving has long been one of those occupations that can provide temporary employment for some people, including actors. Working as waiters is not their only option, although I agree it seems a popular one. I would think the possibility for immediate employment, without formal education requirements and making much of an investment, except maybe some prescribed clothing, would make it attractive to an irregularly employed actor.
I never had an actor driver to my knowledge, but some others have been interesting. When I first met my future first partner he picked me up at the airport in an executive limousine. Turns out the driver was a new author, waiting for his book to catch on (not sure if it ever did). He had some copies on the front seat, and gave us an autographed copy.
Another driver of a standard yellow city cab was a freelance photographer, who rode with his camera and took photos of New York City between fares as he traveled around. He said he got some good shots of all kinds of street happenings, that he tried to sell to various print outlets. Had his own darkroom at home. He hoped to eventually make a living with photography alone. Although I believe becoming an NYC cabbie at that time wasn't very easy, so I'd think he'd need to have had some pretty firm prospects before he would have handed in his car keys.
I've also met teachers who only drove the company cab during their summer break, and some just at night and weekends, their second job. You might find anyone behind the wheel of a taxicab.