Confusing, ambivalent signals, warmth, friendship, physical contact - then abrupt indifference excused by professional need or marital status, especially for secondary gain, especially practiced routinely around vulnerable aging women in difficult personal situations - is a classic manipulation and a textbook emotional abuse. Chronic variable scale ambivalent treatment conditions these victims to continue returning over and over again, spending all their money and embarrassing themselves. Mind, I have not mentioned dancing yet. I am a psychiatrist, and I have seen these women of all ages - victims of ambivalent signal manipulation over and over - hospitalized, suicidal, obsessed, their lives destroyed. Those are extreme cases and I have never encountered any in practice that had anything to do with the dance instructors - but since I entered the dance studio world, I was shocked, how this type of abuse is actually a trademark of a dancing industry; I have met with a lot of victims and I observed the works just while sitting and watching the dynamics on the floor. In short - "hot"/"cold" treatment is an emotional abuse, no matter what setting it happens in.
There are wonderful professional instructors who do very well without that crap - especially when you clearly indicate what you expect from your lessons. But you have to actively search to find them.
Dear Katemeg - just make sure that you, as a customer and a sophisticated woman - completely control the process and withdraw from any sticky situations immediately. You are not going to win - these are cunning very fine tuned players for your money. Some are cynical and the process is very clear to them, some may not even understand some of the things they practice - their mind and conscience are very well protected by multiple immature subconscious defenses, but does it matter to you? I wish you all the best - dancing is a beautiful, healthy hobby, once you are in control and not being played.