It surely depends on the size of the room. In my father's flat (50 m^2, one bedroom), there's enough room to expand the table without taking any major furniture

It surely depends on the size of the room. In my father's flat (50 m^2, one bedroom), there's enough room to expand the table without taking any major furniture out. The table needs to be moved to a different spot though. I haven't asked him where he gets the extra chairs from - probably some from the bedroom/kitchen, but still you need more. Also, with 8-10 people it gets crowded in the room, but that's not a problem (or - even more fun) if you're dining with people you're close with. TLDR: it's not ideal, but doable.