Prohibiting roommates would drive the rent per person up and the rent per unit down. That would make the city less affordable to both renters and landlords. T

Prohibiting roommates would drive the rent per person up and the rent per unit down. That would make the city less affordable to both renters and landlords. The problem with AirBnB is that it benefits landlords and tourists at the expense of renters by driving the rent per unit up, the short term rent per person down and the long-term rent per unit up.