Auctions may not be advertised by hiring trombone players to play on the street.

5.54.310 Unlawful activities designated. All auctioneers are forbidden to conduct their sales in such manner as to cause people to gather in crowds on the sidewalks so as to obstruct the same; nor shall they use immoral or indecent language in crying their sales, or make or cause to be made noisy acclamations such as…