The only way to ensure women could eat food without falling into selling their bodies for deli meat was the creation of "women-only" restaurants, though men could also come inside if they were on a date or wearing a convincing wig. These special lady restaurants were known as ice cream saloons, and focused on light lunches (because women are vain and obsessed with their weight) and elaborate desserts (because women have no self-control and gorge themselves on tasty junk).
Via Jan Whitaker
By the 1920s, restaurants stopped pretending they were protecting anybody's morals and finally admitted that they didn't want women there, "easy" or otherwise. As such, women spent the first half of the 20th century launching lawsuits and staging demonstrations until they were finally allowed to eat wherever the hell they wanted. In some cases, that took until the fucking 1970s. Man walked on the Moon before women were allowed in certain restaurants.