Tap that keg
Similarly, keg watch is sacred, and remember that a lot of beer -- particularly ales -- is better slightly below room temperature than it is chilled; you’ll taste the flavors a lot more if it’s not cold. So while you are more than welcome to ice that keg, don’t go overboard.
It’s easy to get a cup of foam out of a keg if you don’t know what you’re doing. Play dive bartender, prime the pump, and pour at an angle so none of that precious beer goes to waste. Better still, teach the group how it’s done, and they’ll drink properly for a lifetime.