The Board of Playground and Recreation Commissioners may make any rules and regulations governing the presentation of any spectacle, pageants or other exhibitions on any wharves, water or public lands within said areas described in Section 63.01 when in the exercise of a reasonable discretion of said Board any such spectacle, pageant or exhibition causes crowds to be collected on any wharf, waters or public beach lands in a manner that might endanger the lives, persons or health of the public. The Board of Playground and Recreation Commissioners shall make any rules and regulations that it deems necessary governing the use of any public beach lands by the general public, bathers, exhibitors, vendors, advertisers, and handbill circulators, and it shall be the duty of the Department of Playground and Recreation to patrol said public beach lands with lifeguards.