Luba Kemenova is the founder and owner of ostPost in Berlin-Mitte. ostPost is a café, bookstore, and event space with “an Eastern European touch,” as Luba calls it. The Russian-born entrepreneur followed her dream to open the café. She has not only created a business for herself, but she has also created a great space for the Eastern-European community in Berlin. It’s about time that we introduce her to you. This is the amazing Luba. Where are you from? I…