For Flinterforge, I’ve been thinking about it…and I think something like a Makerspace would be fitting?
At first I was thinking of almost like a blacksmith’s workshop, or maybe something steampunky, but the whole thing about Flinterforge is doing things efficiently and better than before. Having Ye Olde Forgery would be too anachronistic. In our time, they’d have everything top-of-the-line, better than anywhere else. Something sleek and modern.
So my image is just this big open space, there’s lots of tables pushed together - the kinds that have whiteboard surfaces. Honestly, whiteboards are probably everywhere, ready to have new, better ideas written on them. The whole building is just built to facilitate creation, and there’s different floors geared towards various fields - computer labs, art studios, garages - if it can be built, then the Flinterforge house has the tools to do so.
I don’t think there would be a sleeping area, at least not with beds and such, but there would be a napping space. Futons and bean bag chairs and such where you can veg out and take some time to recuperate your energy. But then it’s right back into the thick of things. After all, there’s only so many hours in a day.
As far as location - I imagine it would be somewhere lively, like a city. Somewhere where Flinterforges can see the problems people have in their lives so they can come up with ideas to fix them. And especially with cities being centers of industry, I think it would fit pretty well with the guild.