I cannot remember ever seeing a place that does endless wings here (I think that is more of a midwest thing - at least it is big in Hayward, WI where I just came back from last Weds).
I like the wings from Wing Stop (I get the cajun, extra saucy and their fries are great). Ye Rustic Inn has big wings which are also good.
Check out this Spot in sylmar area called West Coast Hot Wings.
The wings are huge and the sauces are amazing... They have mild to wild.
And they are very good priced. The only thing is that they are not crispy but you have to request it and they will do it.
Not endless, but a new place just opened in Encino called Daddy J's Wing Shack. I tried them for the first time and the wings are pretty good. They were big and cooked well. my only gripe is that I could barely tell the difference between the original "Hot" and the "As Hot as my Red-Headed Wife." Neither were particularly spicy.