Pickleball was invented in 1965 on Bainbridge Island, not far from Seattle. It is played on a hard surface with paddles and a hard plastic ball.
The game has seen a surge in popularity here in the city, with many tennis courts used for pickleball sessions.
The pickleball court is the faint green line painted onto the tennis court (a brighter line for the back line of the pickleball court, can be seen on the far left). The net of the tennis court serves as a barrier between the two pickleball courts on it.
Somewhat shockingly— given its proximity to where pickleball was invented— Seattle does not have dedicated pickleball courts just yet.