Hmmmmm. Just call some of the other clubs and ask them which certifications they accept and see which ones pop up.
Is the owner certified? Maybe you should call instead and ask for the aerobics coordinator and ask for the head personal trainer of the clubs in your area. They are the ones who do the hiring, unless the owner of the club is also the person who does the hiring and is involved with teaching at the club.
Let me know how that goes.
Koffee