This Aspire lounge is after security, on the non-Schengen side, in the middle of Schiphol, closer to vertrekhal 2, AA check-in is in vertrekhal 3. So after check-in, security and immigration (passport check) turn right and head towards the D pier. You still may want to leave the lounge an hour early to visit a small branch of the Rijksmuseum (fine arts) Holland Casino (gambling) and the shopping mall that’s Schiphol airport.