There were a lot of complaints that there had been a noise after 9 pm because we had started cleaning at 9 pm. Since the complaint had been kept continuing, I suggested that the order should hold until 9 pm and customers should leave at least at 9:30 pm.

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Also, to let customers know that there will be noise due to cleaning, I included small notification as well. After the last customer leaves at 9:30 pm, the employees now can clean the space where the customers have used.