Custom Rendering with LWRP/Universal

In my current project I have a set of rooms. I know the objects in these rooms and I know the lights as well.

I would like to use the LWRP/URP to hopefully to be able to render out each room.
I would like to render the room and all its children objects, corresponding lights together.
Then move on to the next room.

Having started looking at the source I seems like everything is really just culled bassed on some filters and then rendered. With the various passes.

I am wondering if its possible to say render a subset of objects and associated lights.

foreach(Camera)
foreach(Room)
Render(RoomObjects, RoomLights)

Or would it be better to adjust render layers / enable game objects, then re-cull and render for each room. Ideally I would like the option to have per room shadow casting lights etc.

I am aware of layers, but a level may have more than 32 rooms on the screen at a time. I don't want to use layers as a way to separate rooms, unless it was to assign a single room to a layer, culll render, then set next room to that layer repeat.

Anyone do anything like this? Any opinions on which method?

Thanks

 

Looking more I guess the culling i was seeing seems to be more for the lighting.
And the DrawRenderers seems to take just some various properties to what i am guessing is internally cull the renders that match.
So far I haven't found a way a way to specify a fixed list of object to be rendered

Looking more like will have to put objects an active layer kind of thing.