I usually bottle special or big brews from the keg when it reaches the carb level I want. Then I have more space in the keezer for things that go faster and I can keep a few of each "special" beer in bottles on the hump. I will pour one of these special beers if they ask for them, otherwise I let them serve themselves from the taps. I usually have an array of fairly low gravity beers on tap because that's what I prefer to drink most of the time. If they go through half a keg of one of those then I'm not out a lot of money and I appreciate the compliment 