What’s the point of an office? For the digital ad agency Grow, it’s to offer what your home can’t: Opportunities for chance encounters, collaboration, and community. That’s what they asked for when Richmond, Virginia’s Campfire & Co. and its design partner Work Program Architects began sketching out their new home in Assembly, a former department store-turned-office campus in downtown Norfolk. What they got was a space as flexible as it is inviting.