SwingcatKurt is right. Manny's shows are great. He was a former local radio DJ in the past, KEARTH101. His show isn't really near North Hollywood, only kinda close to Disneyland. I sing all over Los Angeles county, but mostly on the South to East side. Hollywood is on the North to West Side.
In the North Hollywood area there are a couple, I have been to the Foxfire, it is alright on Wednesdays, and Nora's has karaoke on Wed. & Thurs.
Like stated above, just go to one of the local joints, get a karaoke scene, and go hopping. There are tons of places near by.
Felix the KJ