Flying business class shortly as a Star Gold, hand baggage only, ORD-ATH then onward ATH-CHQ on a different ticket more than four hours later. Is it possible, and if so, desirable (for shower facilities or better catering, for instance) to visit the non-Schengen lounge upon arrival from Chicago before passing through immigration? Or is it best to just make our way to the intra-Schengen lounge after landing? Thank you!