This one has it all--bar brawls, guest stars, and most importantly, Grant Goodeve and Willie Ames singing.
The episode begins with the Bradfords throwing a party to celebrate the paying off of the mortgage on the house. And what would a party be without David and Tommy singing? No party at all, that's what.
Their chemistry inspires Tommy to book the brothers at a local bar's amateur night, and he even creates some stage patter for the occasion.
Unfortunately, not everyone feels the Bradford boys' charms the way I do. Case in point: obnoxious heckler Gerald McRaney. I wonder what McRaney's ratio of obnoxious to decent characters is?
Long story short, Gerald instigates a skirimish involving the Bradford daughters, a brawl breaks out, and--hey, it's that big guy from the weird Sanford continuation NBC tried in 1980:
You can see this episode on Warner Archive Instant, where the whole series streams. Not all episodes have as much action as this one, though!