Here are some 'rules' of BYOW:
- check in advance if there is a corkage fee and if there are restrictions (like number or size of bottles)
- don't bring your own wine just to avoid restaurant prices; you will pay more for a bottle at a restaurant, yes - but you are paying for service, stemware, maintenance of a great wine list, and part of general overhead
- don't try to serve yourself and expect a discount on the corkage fee
- don't bring a wine that's on the restaurant's list, it's rude
- depending on the establishment, corkage fees could be the amount of profit on the restaurant's least expensive bottle (typically priced at three times wholesale, so if it cost the restaurant $10, you would pay $30 ... corkage would be around $20)
So, be a good little restaurant goer and brush up on BYOW etiquette. And, if you're a restauranteur, don't be a dink. Honour your pricing. After all, bad press travels a lot faster than good.