In settings where there are long established underworld thief, criminal and otherwise ne'er do wells there is going to be a system of heraldry associated with those who live in and rule from the shadows.
There are gangs, there are biker gangs, there are terrorist organizations, and then there are the Sons of Scorpions
Often times in when alchemy is thought of, we think medieval times with wizards and sorcerers. What if such things existed in modern days such as today? What if the focus of alchemy is common knowledge is can be used for favorite drinks? What if you have a soda machine that can create soda with special properties? The varieties is endless, though good taste is limited. What kind of concoctions can you create?