AA at least used to have cigarette light power ports every three rows or so in coach on their MD-80s, 737s (c. 2000 delivery fleet), and 763s. The seat map on AA.com used to clearly show where the power ports are, but I don't see a seat map anymore. So if those are still there in the exit rows, I'd imagine they're still there every three rows or so. But I haven't been on an AA 763 in about a decade, and certainly not one since the cabin improvement project; maybe they did remove the power ports that were there in coach.

See the older and 2018 threads on power ports.