Existe otra actividad o mejor dicho, inactividad que es aparentemente importante en cuanto a la calificación de los aeropuertos: dormir!!

http://www.sleepinginairports.net/

Are you stuck in the airport? Do you have a long layover? Would you like to save money on an airport hotel by sleeping in the airport? Sure, it may sound a little cheap and degrading at first, but read-on and you'll soon discover a travel community that shares their experiences and advice with fellow airport sleepers.