Just to clarify, whether you pay for a package or pay BOC, you are still getting an open bar (i.e., you pay, not your guests). And unless the majority of your guests are heavy drinkers, you will still likely save money on your reception bar if you do BOC. The way they price BOC is to charge you upfront for what they estimate you will spend and then refund the difference afterward. So if their estimate is over $500, you won't have to pay a bartender fee for BOC either. The estimate is calculated by multiplying the price of the cocktail in your liquor package by 2 drinks for the first hour and 1 drink each hour thereafter for each of your guests over age 21. Most people then get a refund after the event when guests don't drink that much, but if you do end up owing any money, they will take it out of the portion of your deposit they reserved.