trusty: Stay on 74 until you get into Iowa and take the Kimberly/Spruce Hills exit. Take a left at the base of the off ramp (you'll pass back under 74) and take a right at the next light (onto Elmore). Take the first driveway to the left and drive to the end of the building.
The first half of the building is the bowling alley.
I know exactly the exit you are talking about...I'll definitely check it out the next time I'm up that way! Thanks. :thumbup: