That's so crazy, it just might work.
MIT to attract time travellers. The idea is that you get as many people to get the word out about the party as possible, and keep doing so for as long as possible. Later, far into the future, someone will find these and travel back in time to attend. I think that several things could happen:

1. Nobody shows up. Either the campaign failed or time travel is impossible, and we won't know which for some time.
   
2. Everybody and their kid brother from all across the future shows up, the place turns into a zoo, and someone gets ray-gunned.

My money's on the second one.  ¶ 1:06 p.m.