You would do better with this topic if you posted in Norrathian Homeshow, where the other Interior Decorators are. Lady Domino keeps up with it as well.
The key to getting cool stuff as a decorator is to know what's available. I go and browse through the EQ2 Trader's Corner Furniture Pages and Everseek before I start decorating to get ideas.
Tyrus@Butcherblock wrote:
Game room:, dart board, billard pooltables (standard 15 balls and octagon red vs white balls), backgammon board, chinese checker board, fooball (soccer table), D&D Roleplay tabletop and/or miniature wargame table with dices and rulebooks for the looks, Pong table.
Dartboard

Billiards (click for better view) -- some really nicer ones are being made now with bumpers.

D&D Tabletop with dice, rulebook and miniatures

And don't forget the ornate chessboard set, the Butcherblock Chess Table, Zoe's Wild Deck of Playing Cards, Octagonal Redwood Gaming Table, Round Redwood Gaming Table, Square Redwood Gaming Table.
Tyrus@Butcherblock wrote:
Fitness room: hanging punching bag, boxing bag, weight lifting bars/dumbell bars, and workout mat for sit-ups.
I haven't done up a room like this, but here's how I would.
For the punching bag, I'd use either a seafarer's float net or an indium shackle paired with a couple of desert rose cushions padded together on end to make the bag (you'd probably need to do this using the layout feature). Or you can just use the Sir Lucan training dummy.

I'd use an indium shackle paired with an Order of Rime barrel for a heavy bag.
The barbell is simplicity. For the bar, I'd use something such as Lady Fiana's Gentle Suggestion, then add a couple of Small Rusty Gear (inactive) for the weights (might need the layout feature to get the gears positioned right, or choose a different type of gear).
For workout mats, either use the worn straw mat or a dirty bedroll.
Tyrus@Butcherblock wrote:
Nursery: since we got crib and rattle, so it need to add, toybox, wall stickers (rainbows, cute creatures, or cartoon characters).
An opened crate would make a great toybox. So would the elaborate tinkered chest or plain tinkered chest.
The oil painting of a knight would be perfect for a nursery, as would the Sylvan Tryptich, Runaway Clockwork and Snow Bunny Hat paintings.

For toys, I'd consider the carved mahogany rattle, a Jack In The Box, an Erollisi Teddy Bear, A Burynai Teddy Bear, a Strange Elephant Plushie, A Bladed Whirlygig, a pet monkey, A Burynai Seeker, a baby dragon, etc.
Tyrus@Butcherblock wrote:
Youngster/teenager: Lava Lamp, "heroes and villains" posters, Hottie posters, rock collection (got that), and varied "girl power" items, and kid books (comicbooks and fantasy novels).
Some of the mushroom items from the Moonlight Grottos would make nice bean bag chairs. And don't forget floor pillows.
For posters, there's a lot of paintings available that would be appropriate for an older child's room. Remembering that the "rock stars" of Norrath are likely the famous dragon-slayers and such! Consider all the "hand drawn" look portraits crafters make, A Fine Painting of a Riding Knight, Destroyer of Ordanach, Empress Anassa of the Oakmyst, Exodus of the Knights of Marr, Painting: Asharae, Painting: Bayle, Painting: Chestplate of Vindication, Painting: Cyndra's Barbed Spear, Painting: Greaves of the Pious, Painting: Illisia, Painting: Kelpmaiden Maiden, Painting: Lucan D'lere, etc.
No lava lamps, but consider A Droag Gazing Orb, Topaz Gazing Orb, various brightly-colored paper lanterns, an Adamantine Lamp, or the The Breath of Vox.
Don't forget that teenagers like various candles and incense holders. And many aspire to the bardic profession, with a garage band, so they may need musical instruments.
Also, how about a desk with An Ironwood Table Lamp or Ornate Kunzite Table Lamp and school materials, such as a globe of old Norrath, a star chart, an Ornate Ferrite Inkwell or Quill of a Maj'dul Poet. Add a few textbooks and a tattered journal.
Tyrus@Butcherblock wrote:
fancy bedroom decors: quilts for beds and walls, hanging rack (bathrobe and suits/dress).
You can use some of the quilted rugs on beds and on walls. Consider a broadcloth rug, a cambric rug, a square quilted rug, an ornate cambric rug.
Using layout files will allow you to use rugs as wall hangings, and the meat hangar makes a great hanging rack.

Tyrus@Butcherblock wrote:
How about "Art Nouveau/ Art Nior" paintings and window glass sculptures?
I like Art Nouveau myself. The issue is, of course, that it's a style belonging to the start of the 20th century. It harks back to older styles, but puts me more in mind of Victorian or steampunk environments than high fantasy.
There's a couple of items that would fit with an ARt Nouuveau feel, such as the oil painting of a knight, calla lillies in a majestic vase, pink lillies in an elegant vase, the Faydark chair, the eccentric cedar chair, and so on.
Tyrus@Butcherblock wrote:
Arena room: Boxing/Wrestling
This is so easy to do. If you check in the Norrathian Homeshow forum, a number of people have done arenas. I also recently saw a nice boxing ring, complete with ropes, corner posts, and a judge's/timekere's table, plus fan seating (but alas, I couldn't find it when I looked today, possibly because I am still coffee-deficient).
Tyrus@Butcherblock wrote:
Fashion catwalk with models.
The Vale Briarwood Candelabra make great footlights, we have the sandalwood platform and all sorts of counters to make runways from, and you can use plushies or mannekins to display the fashions.