The husbands of her fellow society members have agreed to contribute in some way to put on a show. This prompts Lucy to volunteer Ricky and his band to perform. Ricky, however, refuses (despite Lucy's attempts to "butter him up"), so Lucy is now faced with the daunting task of admitting her goof to the WHS.
By the end of the phone call, though, she assures the society that Ricky Ricardo will indeed perform (referring to her multi-talented son, Ricky, Jr.).
Having a drummer, Lucy enlists the aid of the Mertzes for their "expertise" on the piano and the violin, and Lucy providing her melodious strains on the saxophone. The rehearsal is less than productive (it sends poor Fred, the dog retreating upstairs), and each of the band members--Lucy, Ethel, Fred, and Little Ricky--gives an exhausted Ricky a very different account of the rehearsal.
Ricky then decides to give the band a hand of sorts, and ends up putting Lucy and the Mertzes in a rhythm band for his calypso number,"Man Smart, Woman Smarter"