Need a sitter to attend PS 33 Gala? Check out 

Urbansitter's Chelsea Prep Parents Recommandation

for a list of sitters and nannies recommended by fellow Chelsea Prep parents. It's free to browse and easy to book. New customers receive a $50 credit with promo code FREESCHOOL50 (redeem on your Account - Credits screen)

Founded by four busy parents, UrbanSitter is an online resource where parents go to find and book babysitters recommended by people they know. Looking for the occasional sitter, full-time nanny, or last minute help? UrbanSitter will find available sitters—and show you the ones recommended by parents in your social circles (mother’s group, child's school, sports team, etc.). Search sitters by date and time, book jobs, and even pay online—it's quick, easy and efficient.

http://www.urbansitter.com