Stop in for a cup of coffee

Didja hear the one about the loan officer named Patti Black who was trying to figure out what the small pink porcelain pig was that a frog claiming to be Mick Jagger's son gave her as collateral for a loan?

Her boss explained it to her...

"It's a knick-knack Patti Black, give the frog a loan...his old man's a Rolling Stone."