A city may have beggars, by all means; because it is a place where wealth is created, and sometimes that wealth overflows into charity. It does not have... swarms of people lying about the streets, to all appearances playing the role of beggars, whom nobody ever gives anything and who will not starve if nobody does, because they are demons and need not eat.
A city has a market, or a multitude of them, or is itself the market, and sometimes - not where Venice rules, but it happens - those markets deal in slaves; it doesn't have only a slave market and nothing else. It doesn't have "traders" who don't need a profit to live, but play-act at slave trading anyway because they enjoy being cruel, and someone more powerful has decreed that their toy city must have a market.
A city has brothels, no doubt, or elegant courtesans as famed for their conversation as their beauty, or back-alley whores, or all three... because everyone needs to eat and some people are willing to admit that every comparative advantage allows some gains from trade. It doesn't have... Abramo can't find words for what the "Ten Thousand Delights" is. It's as though someone heard that a properly decadent city should have dens of sin selling exotic sex to stir jaded appetites, and didn't actually understand much about sex (or sin, or sales, or plausibly even appetites) but immediately set off to invent some exotic variants of it.
A city has courts of law, or merchant arbitrators, or clan elders who mediate disputes; and those courts may be corrupt or they may enforce bad laws or they may be tools of the powerful against their enemies or they may just be overloaded and arbitrary, but they don't hold "trials" whose sole and avowed purpose is to demonstrate the contempt that all involved feel for the concept of law.