I often have long layovers before intl flights in MSP and usually go to the pay-by-weight buffet near concourse G4 for a salad with a couple quarter-spoonfuls of hot offering, and then spend most of the rest of the time in the C Skyclub (pour your own; intimate, nooky atmosphere vs. the nervous-making open barn atmosphere of the F/G skyclub).
Used to play pinball, but the arcade has been replaced by a chiropractor.