So, you're a fresh swarm of bees newly thrown off a crowded hive, and you're out trying to find a nice location to rest while your scouts seek out a new home. You pass parks with nice tall trees, you pass houses and barns with inviting eaves, and instead... your fearless leader (whomever that might be) decides that this is the perfect place to hang out...
Easy enough swarm to catch. I just held the chair over an open cardboard box, did a quick downward snap, and they all fell into the box. Tape up the box, head home, dump them in a hive body (with bottom board, inner and outer cover, and done.
I put them in one of my remote yards, at a nearby ranch. I'll check in a week to see if they decided to stay or if they took off, which sometimes happens with newly hived swarms.
Thanks to Patty in Moorpark for the call, and for her desire to keep the bees alive after they decided to use her patio furniture for a temporary home.