Resources for visiting colleagues

District native here. A multi day professional conference will be in DC in November and I'd like to be able to suggest to colleagues sites and sights that show DC as a place with a history where people live and work, not merely a place where people (try to) run The Government (into the ground). I know the website mapping residential segregation, but there's a more narrative historical website I've lost track of. And are there any non superficial tours of the District that go beyond the usual museums and institutions? TIA.