I just saw that today's You Swoop deal is a professional airbrush tan at
Celebrity Skin Couture Air Tan in Wrigleyville (3350 N. Southport) for $20.
I can't vouch for this salon, but I did have airbrush tanning prior to my wedding at a salon and was really happy with it. This might be a good way to not bust your bank!
http://www.youswoop.com/Default.aspx