First time rider, here... Arriving in Chicago Union Station via CZ (roomette) at 2:30pm and staying overnight in a nearby hotel. Departing Union Station the next day on LSL (another roomette) later in the evening at 9:30pm. As a sleeper car ticket holder, can I enter, exit and re-enter the Metropolitan Lounge multiple times? Or is it a one-time entry for the day of your ticket?