We oftem split the bill, the best place to go for tea only accepts one pymt per table so makes it easier. But we are always speak up, if bottles of wine are being ordered etc and we don't partake we don't pay...simple. Often though it's with really good friends so we know it's all even, the boys drink the same and we always make joint decision on things like entree etc.....I would just take cash and pay for what you had, it's no fun when you have to stress about a budget is it.