Like this. If you hang one of these on each side of every 45 degree beam support (and buy a few more ala carte) you would have pretty reasonable coverage and consistent cocktail-party level volume. This amp even has 4 inputs so you wouldn't even need to buy a separate mixer.
https://www.ebay.com/itm/JBL-VMA1120-Commercial-70v-Bluetooth-Amplifier-10-Wall-Speakers-For-Restaurant-/303878838482?_trksid=p2349624.m46890.l49292
The pendants are sexier but perhaps more expensive and would only provide about a 120 degree cone of coverage underneath.
You could also do a combination of these shapes -and pendants and adjust the "tap"'on each speaker to adjust the relative volume of the different locations/shapes of each speaker.
The (perhaps only) benefit of a 70v system is that it's easy to add more speakers if you like, or to swap out the power amp for a little more oomph down the road. It's still relatively easy with conventional speakers, but takes slightly more care with wiring and is more expensive.