You can be fined for singing out of tune for more than ninety seconds.

50-20 Vagrants. The following shall be deemed vagrants. (4) Common pipers and fiddlers. (13) Persons neglecting all lawful businesses and habitually spending all their time by frequenting hosues of ill fame, gaming houses and tippling shops. (14) Persons able to work but habitually living upon the livings of their wives or minor children.