Rosebud and Daisy
Two female killer klowns, named Rosebud and Daisy, were seen sitting next to a ball pool where Rich and Paul Terenzi had landed. Paul asked, “Are you Debbie’s roommates?”. Paul may have been partially correct. They heavily kissed Rich and Paul on their faces and were trying to cling onto them, but Rich and Paul were able to escape from them, meaning that they probably just plain drove off, as it was visible their shirts were ripped apart and they were kissed with giant red lip marks on their faces. (It's also possible that they did, in fact, have sex with them. The guys don't seem too picky about women...)
Most likely, the female klowns prefer (if not are forced) to stay back at home and are not as fascinated as hunting down humans for food like the ones seen attacking the town's population during the movie.
Mutated Human Women?
It is possible that these two Klowns were originally human women that the klowns captured and who have been turned into female klowns. The scene where Slim encased Debbie inside a balloon was possible foreshadowing to the fact that some female victims were not killed, but brought into the Big Top to be turned into klowns. One theory is based on the fact that Rich and Paul were kissed wildly by the female killer klowns, implying that they want to be impregnated to reproduce klown offspring (and/or the male killer klowns are creating sex slaves.)
Interestingly, unlike the male killer klowns, they seem to have no interest in harming humans. Perhaps they are less violent, or just want men.