That works fine when there is only one game one. How does a bar full of people listen to three separate college football games going on at the same time? Also, a lot of people are introverts and like to be around other people without being forced to contribute to conversation. You can feel part of the crowd with being in it.

You could have a speaker on every table without wiring the place all day.

I suppose, but they'd still need electricity so running PoE is no harder and then you aren't worrying about things like interference.

Yeh, that's the logic I apply to CCTV installs. But a restaurant could easily swap drill batteries out of table speakers at cleanup every night.

That's the difference in £200 speaker * tables vs that + poe gear, engineer and cable install that must what 10 grand? And now you can't rearrange the tables for a wedding party.