I have a few questions. First, I love the drink calculator on evite.com. Its the best.
It tells me for 90 average drinkers for a 5 hour party I need 270 cans/bottles of beer and 54 bottles of wine.

I don't drink. I know nothing about wine or beer. I know that a few of my friends like wine and I know the beer that they will drink. I don't want to spend a ton of money on alcohol but I want it available. I've heard about 3 buck chuck from TJ.
What two beers should I serve? A regular and a light?
I know I need a white and a red wine, would 3 buck chuck be ok?
Do you think kegs are tacky? (The alcohol will be outside on the patio and will be served by a bartender, no keg stands for us)
I read that there are approximately 165 cans/bottles of beer in one keg, if I only need 270, what should I do?
Where are the best deals you've found for beer and wine? Any places that will return? Discounts? Where do you get a keg??
HELP!
TIA!