yeah i'm leaning a different way with several TC9's on a 70 V line for a more shopping style experience
I'm with @soldermizer, high directivity horns. Maybe combined with a column. And big horns will control the directivity lower.
You could be the first to create transparent Cornu spirals for a couple of those larger glass panes on the sides there. Part of the wall, it'd be completely out of the way. Plus you could get a nice stained glass effect by using different color tinted vanes separating the horns!