There should totally be special rooms in guild halls!

I for one would like an arena, like a fight club for guild members to pvp for fun or for rewards.

Disco room.

Robot butlers (in higher tier halls).

Meeting room with round/square table.

Bulletin boards for memos and etc info.

Shooting range.

Decor, like plants, screenshots of GM and members, kitty pics, statues etc.

A cage for guild members that have been bad. MUST

Lets not forget cake in any form or size.