Well you know them better than I however: Plan on 1 beverage per guest per hour, Then buy about 50 % more!
Remember, you don’t want to send anyone out into the streets drunk!
Ask your store if you can return unopened liquor! It shouldn't make much difference with soda but with wine and beer it can get expensive.
Assumption on consumptions:
-- Wine: One bottle of wine provides five glasses, depending on how your pour. During a party, plan ½ bottle for every guest.
-- Nonalcoholic beverages: Assume guests will drink two in the first hour and one for each additional hour of the party. If the weather is warm, expect guests to drink a bit more.
Remember, not every guest will want to drink every option – you hope!
Buy ice. This is easy math: 2 lbs per person.
Fill ice coolers to set near the bar. Be sure to keep ice for glasses separate from ice used to chill bottles and cans.
Buy or rent glasses. You don't want to run out of these! Start with estimating that everybody will use 3 a piece. Those pesky people will insist on changing what they drink and when.
Suggestion: buy red plastic cups and have magic markers handy for guests to write names on their own cup – cuts down waste.
(They will still use more than one!)
"serving" Master Indy