Upon entering Stubhub's San Francisco office, visitors are greeted by a 2004 World Series Giants ring in a highly secure display case.
It's just the tip of the iceberg inside the sports and music-themed office for its approximate 400 employees based at headquarters. "One of the coolest things about working here is that we're all fans of something," Anne Robie, head of human resources at Stubhub, told CNBC.
"Our job is here is to bring that fandom to our customers," she said. "In fact we don't even call them customers, we call them fans as well."