It's not a real spaceship until it involves beer. Enough spare resources to make brewing and creating beer an acceptable and non-life threatening activity. And systems resilient enough to cope with drunk passengers. The ISS is a long way from this!
I think we should take this idea further. It's not a real spaceship until it's ok to smoke a spliff or a cigar. And in true steampunk-style, do that while drinking brandy and wearing a smoking jacket.