Cheapest Party Ticket?

The stars are out for Super Bowl week in Detroit, hosting or appearing in dozens of parties around town. Of course, the big dogs are thrown by Playboy (renting out the entire Detroit City Airport), Vivid and Maxim. And tickets are around $750. Don Barden is throwing an "ordinary person's party" featuring several R&B singers, but tickets still start at $75. Ditto for Usher appearing at Clutch Cargo's in Pontiac. What I want to know is, where the $20 parties at? Do they exist? Anyone?