We are a hair, health and beauty studio and our hours are:-
10am -6pm Tuesdays, Wednesdays and Fridays
10am -7pm Thursdays
!0am -4pm Saturdays
If you have set hours and they are displayed on the premises NEVER EVER close early just because you are quiet. I have very strong views on this. There is nothing worse, as a potential customer,to have checked out a shops working hours, to go and find it shut early. I personally would not go back.
There are always things to do during the quiet times, eg; cleaning your working area, working on advertising schemes, preparing ideas for "offer" leaflets, etc. If business is slow think of ways to increase it. Be proactive not reactive.