Hey Nonnie!
No worries! Love a question, me 🙂 they make me think!
I’ve answered your first one, some time back! Here is my answer.
Summarised: yes, Dwarves can TOTALLY find romance in the Halls, but it takes a while because of the huge stagnancy/inertia of the Halls. They are a place of waiting, and of peace, basically. So things happen slowly, if at all.
(still, Bifur and Ori managed to discover love for each other after death, so heyyy it happens!)
Oh yeah, other clans could totally happen! ABSOLUTELY happen. I mean, I have a few inter-clan relationships going on already… Bomfris is a Broadbeam, Orla is a Blacklock, Bifur, Bombur AND Bofur are Broadbeams… Gloin is ½ Firebeard… etc!
I think mingling would depend on the Dwarves as individuals rather than as a unit. Some would like to keep only to those folks they know – or knew, rather. Some are gregarious and curious and interested in meeting new people and learning about them!
(Bombur would absolutely be one of these… he’s a rather reticent fellow by nature, but he must-must-must know about their food, what are their cuisines like? Can he try it? What ingredient is this? May he PLEASE watch you as you make it???)