Evening ethandron,
We serve it up in the kitchen/diner, by putting spaghetti on plate first, and bolognese sauce on top..not covering all the spaghetti..If guests want more sauce or pasta, give them more, as cook enough and keep back in case.
Put garlic bread ( Peter Kay will not be impressed ) grated cheddar and parmesan cheese on dining table. We have a seperate dining room, in addition to the kitchen diner, which can accommodate up to 16 people....We use both to entertain, depending on how many friends/family we have.
We sometimes put in some meatballs in the sauce, and ask who would like them with or without.
Do the same for Chilli con carne dishes, and the same for types of Curry's too, with either rice or chips, or both, unless we're, in Spring or Summer, eating out in the garden, where we put everything in dishes, and people just help themselves, and serve their own.