Sorry! I just don't buy it. If there is room for a speaker stand there is room for a sub. Put the Tops on a pole on top of the sub. If the speakers were on the floor raise each speaker and put a sub under it. That is one Lame Azz excuse. You need to be more creative in speaker placement.
Are you sure you were at a Bowling Alley and not a Kiddie Playroom? Next time post pics.
Here is a Bowling Alley for you and this is a small one in a average part of town. Sit back and enjoy the Slideshow
http://www.threehundred.com/houston_tour.html