The couple, who recently celebrated their one-year anniversary, was spotted having a casual chat while making their way to a white car. Couple sitting chatting on porch step. RF. Casual chat in waiting room. RF. Architect and banker discussing project. RF. Two senior women sitting on park bench. We meet informally to talk about Blockchain technologies. What is a Blockchain? How can we use it in the real world? Are there any good use cases?Sometimes.