Tap your current location for example 425 Collins St.
If you tap on the 4th floor this will open a new tab and display the location in Google Maps.
The Location Switcher displays. When you switch your location you will be able to see which floors have availability. You will see how many desks are still available and ready to be reserved by you. The number in the center is the total number of spaces you can reserve and the purple is how many available desks you have permission to reserve.