You're trapped in a room at work for 48 hours. You and a few colleagues. Would you rather be trapped in the bathroom or the kitchen?
Obvious pros of the kitchen are access to food and drink (inc. kettle, tea, coffee, etc). Big downside is you're going to have to go to the toilet in there too (in front of Barbara from Sales).
Bathroom gives you access to water, but you're going to be bloody famished as there's no food. Big plus, toilet facilities on hand and you could possibly make some kind of bed out of toilet roll and towels.