You can create as many seating charts as you want, and you can associate all of them to the same event. 

This is especially useful when you have large and elaborate seating chart, with many seats and a complicated layout. Breaking it to multiple zones will make it much more easier for navigating, especially on mobile devices and devices with lower screen resolution. 

We'd suggest reading through the workaround we have provided here which will allow you to make seat reservations in large venues a breeze