Not sure if this helps, but If you have time and are just looking for fun adventures, check out Santa Barbara & Santa Maria areas, just Google poolhall/billiards and you’ll find the obvious spots. 1.5-2 hr drive from Santa Monica, but several fun rooms and bars and the coastal drive up and around those areas is gorgeous & great non pool fun on their own merit.
For more serious pool fix, you could investigate Shooters Bar & Grill, classic poolhall scene with mostly GCs, a few Diamonds and lots of Valley bboxes - a few locations within 2 hrs of Santa Monica. Temecula & Riverside locations are pretty action filled spots, suitable for easy friendly fun games, solo practice, and also a large, vibrant & friendly Filipino pool community, all the rotation, 1p, ring games and weekly tourney & league scene that one could want. Temecula spot seems to be Jose Parica’s home room these days. Great fun and experiences to be had, but non pool stuff to do in those areas is basically nada.
If you somehow find your self in Monterey, Santa Cruz for San Fran areas, PM me and I can steer you to more fun spots.
Hope it helps. Enjoy your travels