I spent some quality time with my wife at Miami South Beach. While I was down there I went to:
Lock & Load Miami. They have a machine gun experience. It lasts 30 to 45 minutes. You get to fire 3 to 7guns.
I chose the "Express Package" and it included 3 weapons. For each of the 3 rifles there are 25 rounds per. The three guns in this package were:
25 Rounds :: Colt Commando 9mm
25 Rounds :: Colt M4 Commando
25 Rounds :: Glock 18 Submachine Gun
The total cost was $134, it was well worth it. If you do go I suggest taking the Go Pro pkg for an extra $29, they set it up right in front of you and it records the whole time.
The Glock 18 was my favorite of the three.
Here is the link if you are interested:
They also have a 50 Cal you can shoot. It is $50 per shot