well i guess a mix of politicians, street thugs, wannabes, local businessmens
as for the numbers of the associates well you can do that :
let's say in NY especially the westside (who are strong, and huge in numbers)
let's say they have 6 associates per made guy.
so for instance if they have 220 made guys (which sounds fair enough) so they have around 900.
of course that was just an example there are cases with members who have around 10 associates and some with 3 it's all depends,
but these is how people who made charts guess the numbers,