Well, I am glad you have a son with independent thinking; he just asks for what he wants. BTW, why don't you trade with him on his after school activities, e.g. maintain good result etc; Win Win situation.
you can try my son's dancing school. They have hip hop class today Sat 3-4pm at Prince Edward(just above the MTR). We have 4 boys in our class. As I know there are 8 boys at the other branch Tokwawan. Any interest, pm me.
what's wrong with boys to love jazz dance (or dance in general)? have you watched 舞動全城, being able to dance is a very joyful thing. just take a look at aaron kwok, does your husband (or grandpa) think aaron kwok is girly?