Is there a mile high club for trains?

While the term "mile high club" traditionally refers to people who engage in intimate activities on airplanes at cruising altitude, there isn't a specific equivalent for trains. However, some luxury train services may offer private compartments or special arrangements that could potentially allow for similar experiences. The concept would depend on the train's layout and privacy options, as well as the discretion of the passengers. Overall, it's not a widely recognized or formalized phenomenon like it is for air travel.