How do i ask my parents to let me take pole dancing lessons?

-Well basically, i saw this clip on the internet of this women pole dancing and it really inspired me to try it out, the only problem is i don't know how to tell my parents, i would be paying all costs its just the telling them bit i'm having trouble with. I've done a lot of research into the area and so i already know some moves and types of pole and which muscles you use etc. Also please don't comment if you are going to say that pole dancing is for whores and if your parents say yes then they are bad parents because i've learnt that pole dancing is whatever you want it to be and i choose it to be for fitness and self expression and i am 17 in a few weeks and i'm old enough to make decisions for myself :) Finally here's the video's i saw that got me inspired.

http://www.youtube.com/watch?v=NThvLoEymYI

http://www.youtube.com/verify_age?next_url=http%3A//www.youtube.com/watch%3Fv%3DfYci4f0nEZoif you are going to do it on the gym you could just say you are going to the gym and thats its , then later on you could go ahead and tell them you are doing some pole dancing and if they spit their coffee just tell them than it is a good exercise and you are not planning to be a stripper , as simple as that .