Out of them all the ones who strike me as the most obvious are:
Cameron - Performer at Midnight so if that's her kind of place she might have seen him do this thing up until recently as he's recovering from a broken ankle
Drew - Did use to live in LA before he and his brother (Dawson) needed to head home to take care of their mother's things/estate after her death. He's a photographer, regular visitor to the Jam Jar and avid supernatural supporter
Daniel - Has recently attended a Path meeting (more to confirm that it's a cult and get a feel for the people running it than anything else) high ranking vampire and close to the Magisterium. Mostly visits places like Black Velvet, Reverence etc
Elijah - Owns and runs The White Rabbit and has been known to enjoy karaoke and going out/getting to know people so it's entirely possible that they might know one another in passing or whatever. Won't be a huge fan of the Path
Gabe - Born and raised in LA. Runs in a local pack of wolves due to being very close to one of its member. Used to be a witch but was turned into a vampire and still trying to come to terms with that
Jesse - Large overgrown adorable Labrador who generally tends to make friends wherever he goes
Rhys - Much like everybody above he's been in LA a long time and is a well known face in the supernatural community
Roman - Koa's dad, friendly, likes animals and will talk to just about anyone until they do something to piss him off or hurt somebody he cares about and then Nope, no thank you >.>
Seth - Incubus, owns and runs Skin Talks, has definitely gone a very different way than Domino in regards to what he uses his power for and won't be overly fond of an Incubus doing what Domino does with the Path.
All the others are totally up for all kinds of things as well so let me know what your thoughts are and we can definitely get some stuff going