California Landlord- Additional roommate moves in

[Jon L.]

One of our 1 bedroom units already has 6 people in there. A daughter's boyfriend moved in recently. They're on month to month and there is no rent control. 

Do I issue a Notice to Perform or Quit? Under "Witness" do I need to name the exact person by name or can i say property manager(on site or off site).   Also, can't I also just issue a 60 day notice to increase rent by $200 or so. Not related to the additional person, but just because?