A 2019 review of the history is more specific: "in its heyday, as many as 500 resorts catered to guests of various incomes". These resorts, but also the bungalow colonies, were a popular vacation spot for New York City Jews from the 1920s through the 1960s. By the late 1950s, many began closing with most gone by the 1970s, but some major resorts continued to operate, a few into the 1990s. Grossinger's Catskill Resort Hotel closed in 1986 and the Concord Resort Hotel struggled to stay open until 1998.