> For #1, if you have ten people all on Zoom meetings at the same time, isn't that going to kill your fast-for-a-café bandwidth?

Not unless they all start at the same time. If they start a little staggered from each other, there will be time to boot the first person out for trying to do a video call in a cafe around other humans before the next one starts.

Working in a cafe is completely reasonable, and wouldn't disturb other people. Taking a call is ridiculous.