A disco dance created by Beatrice Middleton. It was named this because she always wears a blue bathrobe at night. The song most notably played when dancing it is 'Disco Duck' by Rick Dees. Her friends often dance this with her.
Beatrice: ('Disco Duck' has just started playing) Oh no, I feel Blue Beatrice coming on!
Flo: Uh oh, I remember when you used to dance that! Well, at least you used to .
Beatrice: Well, let's his the dance floor. This is gonna go wild!
Mary: (like the Bay City Rollers) B-L-U-E B-E-A-T-R-I-C-E!! Keep on dancin' to the rock and roll. It's a Blue Beatrice night! It's a Blue Beatrice night!
Flo and Beatrice: Mary, are you crazy!? This is going to hit like a hurricane!
Mary: Right on! The Blue Beatrice is going to smash like a wave!