A staged wedding to bust dealers
As supposedly reported on CNN:

Undercover police, staging the wedding of "a drug kingpin's 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"

A preacher was completing a temperance sermon...
A preacher was completing a temperance sermon: with great expression he said, "If I had all the beer in the world, I'd take it and throw it into the river."With even greater emphasis he said, "And if I had all the wine in the world, I'd take it and throw it into the river."And then finally, he said, "And if I had all the whiskey in the world, I'd take it and throw it into the river." He sat down. The song leader then stood very cautiously and announced with a smile, "For our closing song, let us sing Hymn # 365:"Shall We Gather at the River."