My father is a member of a new indoor gun range, Defense in Depth [1], and they have a deal where you get to shoot a full auto on your birthday (you pay for ammo)
They have several you can choose from, he chose the FN P90, which holds 50 rounds per mag, and fires at a rate of 900 rounds per minute.
The staff was very friendly and helpful. Certainly the nicest gun range I have been to, by far.
I liked that the targets could be programmed to spin, move back and forth, and do several pre-programmed movements for a more challenging and realistic shooting experience.