In some states you are required to pay an employee a minimum number of hours, unless they volunteer to leave. For example, student worker comes in from 12-3, but it is dead and you send them home at 1:30, in my state you have to pay them for 3 unless you ask if they would like to volunteer to punch out.
If we have things that need to be addressed, timely campus relations issues, staffing issues, etc., company will be required by law to pay you a minimum of 3 hours as an hourly employee. So, check your state laws. If I have to answer one email, text, phone call, I am logging 3 hrs, as I will not be volunteering to punch out.
Banking will no longer be on the way home, that's for sure.