Chuck Chuck....it's your cousin Marvin....Marvin Berry....

Aren't there some great bands in films that don't actually exist!
Here are a few of my favs:

Spinal Tap from This is Spinal Tap
The Louisiana Gator Boys from The Blues Brothers
The Soggy Bottom Boys from Oh Brother where Art Though?
Still Water from Almost Famous
The Kinky Wizards/Sonic death Monkey from High Fidelity
Marvin Berry and The Starlighters from Back To The Future
Crucial Taunt from Waynes' World
The Commitments from....The Commitments
Sexual Chocolate from Coming To America
And what about Figrin D'an and the Modal Nodes from Return Of The Jedi ha ha ha.