Sweet 16 Birthday Party

PLEASE PLEASE Help!
My daughters birthday was on Jan.1st and we are having her party on the 13th. I`m a single mother of 2 teenagers, my son`s birthday was on the 10th of Dec., he turned 18, then of course there was Christmas, oh and my birthday was on the 5th of Dec., not that that mattered. I had my son when I was 16, misguided, but I`m now a 34 year old woman trying to raise my 2 teenagers by myself, since they were born.
I had a really cool, perfect plan for my daughters birthday, even affordable, until today...
I was going to have it at a dance studio where they were offering lessons with the party. I wanted to do something everybody else hasn`t already done. Every since "So You Think You Can Dance" aired, my daughter has wanted to learn how to dance, well learn by a pro that is. So I thought this would be a good idea. Of course since it`s my duaghters sweet 16, she wants to have about 60-100 people, I don`t know who she thinks I am.
I`ve always tried to do right by my children since they were born. Made sure they lived in a descent neighborhood, made sure they went to a good school, made good grades and thus far I`ve even kept them out of trouble. You could say I`m a little over protective. I figure just because I wasnt raised right, they shouldn`t have to suffer. I`ve done everything I could as a young single mother to lead them in the right direction. I`ve always stayed broke from trying to, I guess you could say, live beyond my means. I just wanted them to have everything I never had. You all know how that is. My whole life has been about my children. I thank God I woke up and my children have made it this far and have not followed my path.
Anyway the dance studio I planned to have the party at called me today and said they are too NEW to accomidate my plans and they didn`t want to take on that big of a responsibility. I don`t know what to do, I didn`t have a plan B. This party place was only going to cost me under $500 including the lessons, now I have nothing...
If there is anyone out there that may have a suggestion or could help in any way, please help!