Free speech zones have been used for non-political purposes. Through 1990s, the San Francisco International Airport played host to a steady stream of religious groups (Hare Krishnas in particular), preachers, and beggars. The city considered whether this public transportation hub was required to host free speech, and to what extent. As a compromise, two "free speech booths" were installed in the South Terminal, and groups wishing to speak but not having direct business at the airport were directed there. These booths still exist, although permits are required to access the booths.