Twice in the past few months I've arrived in Detroit from my hometown on a one-night trip, returning home the next day, the agent scans my boarding pass 'Your flight is leaving out of A17 and is on-time', with that flight being approximately 18 hours away and they don't mind letting me in (of course I'm allowed access as an arriving passenger anyway).

I will be heading to MCI for my March 2nd flight much earlier than I otherwise would to get some quality SkyClub time in.