It has open air indoor seating (i.e., it's under a roof, but missing a wall), as well as patio seating. There are lots of other little alcoves in the Marketplace area surrounding it, where you can hide in a little corner and nosh.
I've never seen the tables be ENTIRELY full, except for just before and during illuminations.
Otherwise, it's pretty open.
If it is crowded, you can always walk your food over to the fountain in france, and have a seat there.
-Tina.