Hi there,
Thanks for posting! I enjoyed reading your story, and business school admissions committees likely would too

.... it's the real-deal entrepreneurial story working from the ground up, and it would be great to illustrate through your applications all that you've learned through your work at the dance school, the challenges you've faced, what you've learned about establishing and growing a business, and show the perspective you'll bring to the class based upon your experiences.
As far as what schools, there are a number of factors to consider, including geographical region of the world, class size, length of program, campus setting, curriculum, class profiles, hiring stats, etc. For more on choosing schools, check out our free download at:
https://info.mbamission.com/Selecting-Yo ... ram-E-Book.
Are there certain criteria you are looking for in a school? What part of the world are you interested in studying in? Good luck on your GMAT re-take!