An interesting twist on the theme! In fairness to the customers, I don't think there's a place on your person isn't a strange place to hide "funny smelling plant"!
I enjoyed the music and the animations of the characters. I love that once you search them they go inside to dance. Near the end of the game I just started letting people in to see how full I could get it, but I was disappointed that they did replace each other after it got somewhat full.
I liked exploring the environment, but the gameplay didn't really give me a reason to move from the front door or to the boss. There was a slight bug when I got up on the stage and couldn't come down to floor level again, but I eventually floated down.
It was confusing about whether you needed to search the back and front of the characters, or just the front was fine. I thought the 'hat' or head area (with the hand cursor not the finger) was only accessible from the back, but found it on the front part way through as well.
I let the boss's patience run out to see what the game over was like or if it had kept score, but nothing seemed to happen when the bar ran out. It also took a very long time, so if I'd been keeping up trying to search people I don't know if I'd ever have lost. I think it would benefit from some sort of queue mechanic where you weren't allowed to have people queue up for too long outside.
Overall a well put together 3D game for a week.