FWIW, California is not NJ in terms of BYO or corkage. Some places have free corkage--that's generally because they don't have a liqour license. Some won't let you BYO so that you'll only buy their stuff (this is rare--I'm thinking of Bastide in LA). Some will let you bring your own only if it's not on their extensive wine list, which as a practical matter means you can't BYO unless it's cheap wine you don't want to drink with good food. Then they charge $25 (I'm thinking of L'Orangerie in LA). Most allow and some encourage BYO but corkage can vary between $2 (Cafe Bizou, various locations) and $25. $10 is more typical in good places. Some won't charge corkage on multiple bottles, some will. Frequently, waitstaff will "forget" to charge corkage if they feel you've treated them decently and ordered lots of stuff. Occasionally, some that don't charge or that have a low corkage will charge more for Reidel glassware for example (this is rare and I can't recall a specific instance). Usually the higher the corkage, the better the glassware.