Using に conjunctively to mean "In addition"

Question

I think this topic is also addressed in this post, but it doesn't address how に works outside of contexts where the speaker is trying to "trying to think of/recall things". I'd like someone to explain how に is used conjunctively in objective contexts. I've seen examples of sentences where に is used conjunctively when the speaker is narrating a story, which (I think) it wouldn't make sense to think that the narrator is "trying to remember" these nouns.

One example I found in a book I was reading is:

そんなロレンスとホロが入った店は、小さな宿に併設の酒場だ。
The store that Lawrence and Holo entered was a small inn combined with a bar.

I think I might be reading this wrong, and the する after 併設 is just omitted in this sentence. In that case, I assume に is just marking the object of the する verb.

Answer 1

This に is not a conjunctive or listing particle, but is a particle used with 併設.

小さな宿に併設の酒場
= 小さな宿に併設されている酒場
= a bar attached to a small inn

We can say this because 店 can refer to a restaurant/bar/izakaya, but not to a hotel/inn. They entered a 酒場, not a 宿.