The mall's quonset-style Kohl's Foods supermarket. It operated at BROOKFIELD SQUARE for 10 years. Following its late 1977 closure, its space was divided in half, with the northern portion becoming a Houlihan's Restaurant.
Drawing from the Milwaukee Journal

The BROOKFIELD SQUARE "Rain Fountain". Water-less Wonderfall features were common in mid-to-late 1960s malls. They could be found at Southern California's TOPANGA PLAZA, South Florida's PALM BEACH MALL, Rochester's GREECE TOWNE MALL, Cincinnati's BEECHMONT MALL and even Sydney, Australia's ROSELANDS CENTRE.
Photo from / L.L. Cook Company, Milwaukee