The saturation has prompted Miami Beach to fight back, joining the ranks of cities trying to police Airbnb and other short-term rentals. The tussles with Miami Beach and cities such as New York City and Chicago are the thorniest obstacle facing Airbnb as it plans to sell shares on public markets. In Jersey City, New Jersey, residents voted overwhelmingly on Tuesday to limit short-term rentals.

Many of the fights come down to cities trying to keep control over how residential properties are used, while preventing what are essentially mini, unlicensed hotel businesses. Airbnb and Miami Beach recently settled a lawsuit, requiring hosts to list registration numbers so the city can verify that hosts are behaving within the law. But the city is now defending in court its ability to fine hosts up to $100,000 for multiple violations of the rules.