OK, I did not know that light bulbs came with built-in speakers... surprise surprise:

https://www.amazon.ca/Sengled-Dimmable-Speakers-Controlled-Bluetooth/dp/B00PNU8J46

It bugs me that people are working on things like that rather than working on my flying car though.

Anyways, using smart bulbs in permanently-on pot lights seems like a workable solution to providing power for the speakers, and if the speaker could include a lamp socket that would be even better.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8