Help with urban fantasy setting

By Letters&Numbers2, in Genesys

Ok so I plan on creating an urban fantasy setting that is similar to shadowrun but minus the cyperpunk and the corporations. A world where fantasy races lived alongside humans since the beginning of history and no one would think it weird to see an elf walk down the street. However I don't want a lot of magic, so it will be a rarity with only about 1 person in a 1,000 (maybe even 10,000) being magically inclined and even fewer of those people being true magicians. The game will take place in a major city in America (tbd) and be focused on secret societies and criminal organizations (both street gangs and more sophisticated crime syndicates) with the players being deeply involved with that aspect of the world, either as members or as associates of members.

My problem is that I have the basic idea of what I want, but I am having a hard time coming up with ideas for the various factions that would be at play in the city. I have a few ideas so far (nothing concrete or fleshed out), but the main reason I'm posting here is to see if anyone else knows of places I could look for inspiration or has any ideas. Anything would be welcomed.