NOT a backyard party keg. But the bar at the reception site offers purchasing a kef instead of just per bottle which is a HUGE savings. My question is how many should I buy? it's probably going to be about 90-100 people. I'd say about 1/4 of them will drink beer. The reception is 4 hours long including dinner and activities. We will also have a liquor, wine and bottle beer options. Would one be enough or should I get 2?