Have fun with it
The default room is boring. Inviting people there is boring but it can be fun to surprise someone that invited you to the default room with something really different. When you change the room in someone else’s chat your furniture doesn’t show up. But some rooms don’t need much furniture and can be very shocking and fun.
I have a dragon room for example (http://www.imvu.com/shop/product.php?products_id=2519402) that’s very different and really fun. It doesn’t have or need any furniture. Put on a scary demonic outfit and describe the sulfur smell and the beating of his wings as they feel your claws digging in into them a little. Yeah I know you’re not supposed to hijack someone else’s chat but it’s fun to shake it up and have fun blowing their mind a little.
If you have any other really different room you can suggest, leave it in a comment!