I was wondering, is it me or does the Cunningham's kitchen look an awful lot like the Ricardo's kitchen from I Love Lucy?

The Cunningham kitchen was used in "Mommie Dearest" when "Joan" was taking over "Christina's" role in the soap opera.

The counter dividing the kitchen and living room on Happy Days was according to one web page visitor used on quite a few Paramount and Desilu series including I Love Lucy, The Dick Van Dyke Show, and The Odd Couple before coming to Happy Days.