Let me start by saying I WILL NOT be doing this.
But FSIL asked me who I would be having as the master/mistress of ceremony. Never heard of it. She says basically you ask someone, usually a couple, to basically be slaves of your wedding day in my opinion. She said her wedding she had her aunt & uncle do it. Basically they are in charge of setting things up, cleaning up, cutting cake, making sure things go smoothly.
From my asking around, I see this is super common around here. (MI). However I find this super rude to ask your guests to work at your wedding. Is this a common thing that people think is okay everywhere ?