Honestly, I would not purchase a US day pass. The US clubs do not have free internet but the entire CLT airport does. Keep in mind that with an international departures, boarding commences between 45-60mins of departure time so you really have 3 hours and 15 mins provided your inbound isn't delayed. Hang out by the rocking chairs and log on to your computer....get a good meal in because from what I hear the coach offerings aren't that great on TATL flights.