Take a look at the example seating chart below:
Admin-Venues-CloneSeatingChart1.gif


Notice that every row has 25 seats and there are 6 rows in every section. Since every section is so similar it is much more convenient to create just one section and clone it 5 times:
Admin-Venues-CloneSeatingChartCopy.gif


So first use the "bulk load" tool to create the first section. After doing so your page will look like this:
Admin-Venues-SetUpSeats.gif

On the bottom of the page find the "clone" function. From the drop down list select a section to copy all of these seats to:
Admin-Venues-Clone.gif


After the cloning process is complete, you will be redirected to the other section's detail page. Now you can confirm all the seat were saved correctly. You can also make a changes too, such as deleting extra seats:

Admin-Venues-NewClonedSection.gif