I’ll be as gentle as possible; the information you seek is contained in this page http://irvine.carsandcoffee.info/.
It is held every Saturday morning at 7905 Gateway Blvd., Irvine, CA. In the parking lot between the old Ford HQ and Mazda. If you are driving a “special” car you can park in the Exhibitor lot. If you are driving something not so special, then you will have to park in the Spectators lot and walk down about 100 yards.
Cars start arriving about 6:30AM and leave whenever they feel like it, but generally the lot is empty by 9. It’s all very SoCal casual. There is no entry fee as this is just a bunch of car guys getting together on Saturday morning for coffee and car chatter, checking out each other’s rides. You never know who is going to show up in what.