With the objectives of preventing crime, maintaining property values, and preserving the quality of urban life, New York City enacted an ordinance to regulate the locations of commercial establishments that featured adult entertainment. The ordinance expressly applied to female, but not male, topless entertainment. Adele owned the Cozy Cabin, a New York City cabaret that featured female topless dancers. Adele and an anonymous dancer filed a suit in a federal district court against the city, asking the court to block the enforcement of the ordinance. The plaintiffs argued in part that the ordinance violated the equal protection clause. Under the equal protection clause, what standard applies to the court's consideration of this ordinance? Under this test, how should the court rule? Why?