Hi! I believe I can be of help with this issue. First, let me say I can imagine how overwhelming this situation must be for you. Your suspicions seem well founded and I share your apprehension.
I don't know of anyone here who would be able to act on your behalf as we are mental health professionals and not private investigators. You might consider looking up private investigators in LA and asking how much they would charge to search for him.
Another option is to call yourselves. I assume you are referring to:
Westside Tavern. (310) 470-1539. 10850 West Pico Boulevard Los Angeles, CA.
So call them and see what information they might be willing to give you.
A third possibility is to call the Community Relations Office of the LA Police Dept. 213-486-6000
They may be willing to direct you to an agency or a section of the LAPD that might be willing to find him and verify he is not in danger or ill.
So those are three possible avenues. I wish you the very best!
Please remember to click the green accept button. Feel free to continue the discussion; my goal is to get you the best answers possible. Bonuses are always appreciated! If I can be of further help with any issue, just put "for Dr. Mark" in the front of your new question, and I'll be the one to answer it. All the best, Dr. Mark