Swimming pool and showers. Gotta have something to keep the crew vaguely human-looking and bereft of the worst odors.
Medbay, including doctor's office on the left, ward and quarantine ward on the right, and medical supply storage on the back, behind those blast doors.
Munitions storage. Positioned far from anything strategically important, right next to the bar - although many among the crew would consider this poor decision on the architecht's part, if not an outright design flaw.
And now for the
important part - the bar itself!
Dining hall. Strictly reserved for the captain and his cronies, obviously. Offers a perfect view on your quarry being shishkebab'd by the ship's laser batteries.
Interceptor pilots' briefing room, with immediate access to their fighters through the airlocks on the back. Just make sure the ship is stationary when you get out...
The greenhouse:
Ah, the pitch. Whether used for good-natured game of inter-crew football or doped-up slave fight betting, it is sure to keep the crew entertained.
Medical emergency/competitor doping station in the immediate vicinity.
The pleading screams of your past victims getting you down? Come to the garden and zen out stargazing. Guaranteed to silence even the most tenacious shreds of your conscience!