For too long, driving was the only respectable way to get around this city. The past decade or so, Angelenos have warmed to walking, biking, transit, and, especially, Uber and Lyft as alternatives.

Kayde and Liam Keffer have found healing in scootering. In Rome for the World Skate Games in September, the local teens scootered around the ancient city, past the Colosseum, the Spanish Steps and the ...