Last year I bought a vintage Singer hand-crank machine to take with me when my significant other tours a car show. Setup a table & chair behind his '62 T-bird, put up an umbrella, and away I go! Amazing how many people will come up to me to ask what I'm doing. So many of them never knew that hand-crank machines exist! They always ask me, "how can you sew with just one hand?" I reply, "Easy! It sews so straight that I barely have to guide the fabric."
p.s., one of the other T-bird owners had a hissy fit because he felt I was taking attention away from his car which was parked next to ours. IMHO, I was drawing in the crowds! :-)