Don't want to sign up for grocery store club cards. type in the phone number 867-5309 (80's song lyrics) works every time.

My friend showed me this today and I had to share it with you. apparently he has been doing this for years and in at least 3 states. The song was popular enough for at least 1 person per area code to use it.
Warning may not actually work everywhere. leave your results in the comments.