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As for me, I'm not picky about food; I can live on beer and whiskey for quite a while. Regarding delivery, based on my personal experience, it's a very good option. You can always find a delivery service that offers decent food, not just pizza and the like. Also, sometimes I don't mind cooking; of course, cooking for 20 people isn't ideal, but I can feed 4-5 people, at least once over the weekend. Of course, if they don't mind eating vegan food.
Regarding a cook, I personally don't see the point (I can easily go without eating for 12 hours and then eat everything for two hours, and everyone has different eating schedules), but if most people are in favor of it, I'll support the idea.
By the way, does anyone have a poker set? For entertainment, we could play a few rounds. Bringing my own set from Moscow isn't very appealing (the suitcase weighs about 8 kg).