If you turn off one of your speakers can you not hear the other one over the whole dance floor, or audience area? Reducing the width of the stereo signal for playback rarely has any advantage in my experience, even if you don't have good coverage.
Orchestral recordings are about a stereo soundstage, not many pop recordings are. If the system coverage demands mono, semi-panned stereo is not the answer. If the system has stereo coverage, semi-panned stereo is not the answer.
Mac
recent example where I played a 1 hour DJ set before a comedy show. Did intro/outro music in between 4 comedy acts...
room was 120 feet wide x 40 deep with comedians set up where they had a 10 foot stage.
I had one monitor in front of the stage
2 JBL 725 elevated 30 inches from the floor. I pointed the speakers outward from the stage facing the far corners of the room. If I had done a hard stereo, each side of the room would have been missing something. At the same time, a hard mono for the music was less than desirable for the content. That Pop/dance music does have some cool stereo effects built in these days. I could have just set my DJ software (Serato Scratchlive) to mono. The majority of the room could hear stereo but the people at the most distant corners of the room would have been missing that content from the other speaker on hard pan.
It is likely nobody probably noticed but me so next time I'm in that room, I do an A/B with the different pan settings take a closer listen.