Guest. Go to Dancesport USA. Page 11 for the correct Tempos. The Cha is not as you wrote 135 maximum .It is 128. I doubt if you could dance a Cha at 135 beats per minute. Some other person mentioned dancing a Cha Cha to a Country and Western Band. I would almost guarantee that they dance a bouncey Cha Cha which is strictly not correct