hi pebz!
wow! You're super early for your booking! hehe...
Here's my thoughts, they are not very flexible in terms of throwing any free stuffs but in terms of interchanging some items, they are happy to negotiate. But understandable since they have certain cost to cover, etc.
I'm having mine at The Ballroom, it's small and cozy feel, like family gathering in Victorian style. Unlike the modern feel of most hotel so kinda of different. The only thing which I don't quite like is the reception area outside The Ballroom as it's an 'open' area so no air-con... although they can place some hidden 'floor' fan.
Oh ya, that day I saw the layout for 20 tables and it seems alright, my HTB and myself though it might be a little cramp if it's to a max of 25 tables so we're looking to keep it at 23 max for more 'room.
Good luck to you and do share your experience!!