How much would you pay to attend this spa/relaxation party?

The key idea is to attract your friends, but at the same time, not to scare them away. I agree in that $50 sounds a little steep, especially during these difficult economic times. I would say that you should probably drop it down to about $30 dollars. Remember, it's a party, so you aren't necessarily going to get back all of the money that you spent. I hope you enjoy it!