The Puregym I use here is pretty much the same and I can't understand it either. I try to go in the morning before work, my work starts between 12.00 - 14.00.
I tried 09.00 but it was busy so tried at 06.30 and expected it to be quiet but it was mobbed ? An employee told me it's busy from 05.30 to 07.00 for people before they go to work ? I've found now the perfect time is 07.30 - 09.00 and I'm assuming this is quiet because of kids being taken to school etc ? If it's cold weather too the numbers are down, sometimes to single figures.
How are the numbers there ? When this gym opened it was packed with people who I knew wouldn't be using it much as they came in with a friend, looked around a bit, tried a piece of equipment and then left.