Star Wars Holiday Special, where she poured a drink into Harvey Korman's head. Later I'd see both of them in the much better History of the World: Part One by Mel Brooks. But I'd always remember Bea as the barmaid in the Mos Eisley cantina.
Less memorable is when she sings in it. The Special is best loved for introducing Boba Fett in an animated sequence, but it's the awful songs and the Wookiee Life Day idea that make it pure '70s gold. Beatrice can sing- she performed on Broadway- but the songs are just awful in this:
RIP, Bea. You were one of a kind. I'll miss all your snarky retorts, whenever you were interviewed. I'll try to think, like your Ancient Roman Unemployment Official, that you're just on your wine break.