Microbrewer Puns

The two introduced themselves as Sven and Olf. Olf in particular was wearing a t-shirt with the USSR flag on and boasted a cap with a hammer and sickle on, so I assumed he was an avid communist. I asked them if either of them knew where I could get alcohol on the train, and Olf piped up:

"If you go to carriage 4, you can get a guinness, you idiot. You can also find a stella in carriage 6, dumbass. There's also someone microbrewing in the front of the train, but he looks stupid."

I was a bit taken aback at how mean Olf was, but I thanked him for the information. Soon after, when he got up to go to the bathroom, I asked Sven what the deal was with his friend.

"Don't worry" he said.

"Rude Olf the red knows train beer."