Generate fake statistics for testing application

Does anyone know of any software that can generate fake statistics. I’m designing a web application that allows people to book tables in a room, 7 days a week / 24 hours a day. The booking information is stored in a database so the admin can pull up graphs based on historical data. In short, I need to generate “historical” data to test the application. The data would have to be somewhat biased, for example Saturdays and Sundays would be busier than the middle of the week and the tables would more likely be booked around noon on any given day.

Thank You.