As supposedly reported on CNN:

Undercover police, staging the wedding of a drug kingpins daughter, let it be known on the street that dealers were invited (i. e. Expected to attend).

The bride and groom were police, as was the band, bartender, and about half the guests. The band playing at the wedding was S. P. O. C. (COPS, backwards), and the wedding went through the full ceremony, including the dancing afterward.

The long-sought dealers were arrested after the band took their break. The last song the band played before taking its break? I Fought The Law, And The Law Won