It looks to me like it was once designed to be a small venue where the stage was off to the left where the curved Wood flooring is then the bar was placed over there later. Reminds me of what a dive bar would do for a small stage for a DJ/Karaoke/small band type of thing. Seperation in the middle for a dance floor. And an easy access bar to get drinks. Maybe as they got older they stopped having bands and just left the speakers set up and they still dance there.

I’m giving far to much credit though. Probably just a weird design