Daily Customers Over Time - Offices

It seems that customers of both Office Businesses all hit one time when you first open, rather than spread throughout the day.

For a Web Agency that is open 6-22, we get this graph:

For a Law Firm that is open 24 hours, we get this graph:

My retail businesses behave more as expected with customers coming in throughout the day - except for the two random hours I get nothing… For instance, this Coffee Shop: