Is this theater assigned seating or first come first serve?

Only imax has assigned seating

All their theaters are assigned seating now

It now has assigned seating - at least as of 3/1/2019

All auditoriums have reserved seating now (December 2018). You pick your seat when you buy your ticket online or at the box office.

First come, first serve

everything is first come first serve

IMAX is reserved seating when buying advance tickets, I believe.

No..you have to choose you seat ....you can resaved youre seat s