I wanna travel in the second picture class lol. One of my things to do before I die is to travel first class.It depends on the configuration... Each airline can customize their plane the way they want... a third world airliner can fit 850 coach seats in the plane... but for more occidental airliners the more "standard" configuration can carry around 500ppl (in 3 different classes).
business class in the Emirates' plane:
c*ckpit:
How the other half live.
Nelly