The district court erred in not granting plaintiffs a preliminary injunction against San Diego and its ordinance which prohibited teaching yoga to more than four people at a time on San Diego public beaches. Teaching yoga is First Amendment protected speech. The ordinance was not a valid time, place, manner regulation since it singled out one type of speech (yoga teaching) for special treatment. The ordinance could not pass the strict scrutiny test. Public parks and beaches are traditional forums for expressive activities. There was no evidence to show that teaching yoga to larger groups posed any threat public safety or enjoyment of the public beaches.