Sip N Dip
I am a native of GTF and remember as a kid going into the Sip N Dip at the O'Hare Manor and still have a picture of the pool backbar in my mind. My neighbor down the street who flies at Delta remembers layovers at the O'Hare Manor when Mainline was flying to GTF.
Check out the Beacon Bar. It used to be hot, the dancing and all. If you are there in the summer, find someone to pull you waterskiing in Broadwater Bay.
CC