They have a long lunch break, yes (like France). But that's not a siesta. As the other poster said, that's really a Southern Spain thing.

It's not a even Southern thing for most people working office jobs and many other common jobs.

The city is "sleepy" around that time, true, and many stores close around that time and open again later.

But I only know a handful of people who actually take naps here in the afternoon. Sometimes yeah, but if you work in a typical office/startup, you can probably count the people who take a nap after lunch on one hand.

Most people working office jobs or otherwise common jobs do not.