I do in fact understand the correct tempos, the aim of my blog isn't to offer competition strict music. They are all perfectly dance-able as I have done it myself. You can argue all that you want, but there is nothing wrong with doing a slightly fast cha cha or a rather slow foxtrot if its not being judged in a competition or a similar event. Dance is not all numbers and rules, its also a fun social experience, as well as an art form. Also on my personal playlists I do have songs of the proper and strict tempos and I've spent a lot of time studying the different dances and their music. My playlists work excellent for parties, and we even use them for our ballroom classes.