If them Indians can find a shortcut...

Three Indians and three guys are traveling by train to a conference. At the station, the three guys each buy tickets and watch as the three Indians buy only a single ticket. 

"How are three people going to travel on only one ticket?" asks a white guy. 

"Watch and you'll see," answers an Indian.  

They all board the train. The white guys take their respective seats, but all Three Indians cram into a restroom and close the door behind them. 

Shortly after the train has departed, the conductor comes around collecting tickets. He knocks on the restroom door and says, "Ticket, please." The door opens just a crack and a single arm emerges with a ticket in hand. The conductor takes it and moves on.  

The white guys saw this and agreed it was quite a clever idea. So after the conference, the white guys decide to copy the Indians on the return trip and save some money (being clever with money, and all!). 

When they get to the station, they buy a single ticket for the return trip. To their astonishment, the Indians buy no tickets at all. "How are you going to travel without a ticket?" says one perplexed white guy. "Watch and you'll see," answers an Indian.

When they board the train the three white guys cram into a restroom and the three Indians cram into another one nearby. The train departs. 

Shortly afterward, one of the Indians leaves his restroom and walks over to the restroom where the white guys are hiding. He knocks on the door and says, "tickets please."