73% of passengers are heading to ORD, with the balance going beyond. LAX is the largest connector on the SK service, followed by MSP, LAS, MCI, DEN, IAH, PHX. Though the connections are only 27% of the loadings, the list is long (almost 200 city traffic flows beyond ORD). It is possible that passengers arrive in ORD and overnight before heading elsewhere, in which case the are counted as ORD.
As the only Star Alliance lounge in ORD T5 (I use the Air NZ service) I wonder how the lounge merry go round will resolve. The SK lounge in ORD is very ordinary but serviceable.