Group 1 - United Airlines has reopened its Polaris lounge in Chicago, which is now 50% larger than before, featuring Crate & Barrel furnishings [1] - The lounge spans 25,000 square feet, located in Terminal 1 at Chicago O'Hare International Airport, with seating for 350 passengers and additional amenities [1] - The lounge includes six additional bathrooms, a second "speakeasy-style" bar, and 50 seats designated for sit-down dining [1] Group 2 - The first Polaris lounge was opened by United in 2016, coinciding with the launch of its long-haul, business-class cabin of the same name [2] - The Polaris lounge is exclusive to customers flying internationally in the Polaris cabin, establishing a two-tiered lounge system that has been adopted by other airlines like American Airlines and Delta Air Lines [2]