Best UA lounge at ORD for MP credit card pass-holders?
Long story short: my GF has a 12 hour layover at ORD on Sunday, basically 6am-6pm.
What is the best lounge for her to spend this time in, with a pass that came with her MP Chase card? (She’s flying in Y, and has no lounge experience whatsoever, and also no other cards that gain her access to lounges).