I entered via the Garrison, so it's fixed.
It looks like we can have chairs, tables, and plants in the main room. Other people have added expansions to theirs already, and those are quite... elaborate. Like Top Gun, that list might be higher for a high-ranked individual.
For what it's worth:
-We can sit in chairs and sleep in beds. So, if we made a half-effort lobby, it could function in the way I had imagined... Only no music.
-Auction house, Vatel (green Stranger merchant), alchemy booths, and what appears to be a storage locker are all possible furniture. They can be placed in blank rooms, which can be "named" whatever we wish.
-The only items we can buy at the moment for that main room are chairs, tables, and shrubs. Those cost around 12,500 crowns a pop, coming from our guild finances. I don't think we pay upkeep on furniture.
-Pretty much everything Top Gun said back in the earlier post.
Unfortunately, the upkeep is roughly 15,000 crowns per expansion weekly (the timer says six days from now, so Wednesday is when we pay rent). That exhausts our guild coffers in under a month. Since we're a starter guild, we don't pay anything. If the furniture rule holds, we could make a nice hang-out area for cheap.
I haven't touched anything in the way of decoration, but I added 1,000 crowns. I looked around for a way to change colors/themes, but that's looking like it's not possible.
As I said before, I wouldn't mind something simple. If we threw a couple of shrubs at the sides of the guild console door, set up a few seats in the middle, and put a table or two alongside them, I'd be thrilled. I don't think that'll cost us "upkeep." I see from the listing that snipes are available. Perhaps a lazy (table-set) or wandering white one? Maybe some light beacons in the lower corners?
Not demanding. Just tossing ideas out.