Running the twin beds lengthwise against the walls, with headboards against the corners, usually will allow for the most floor space, but the trade off is that it is harder to make the beds that way.

I believe a light grey would look nice behind the blue in the map - it needs to be a perfect shade of grey as grey is hard to achieve. Possibly experiment with various colours - I usually paint on board using sample pots first then hold them up in large sheets to see what suits the area... This gives you an indication of where throws of light will capture the actual colour and which shades suite the room without having to paint on the walls. The board base colour generally needs to be as close to your existing wall colour to achieve the closest match.

Leather sofas can really dominate the room and can give an overall cold feeling. I would add some earthy elements, like a wood coffee table with glass or metal. Go to Restoration Hardware's website and look at their sofa room scenes. And I'm sorry I think the art is too harsh for the room. That's all your eye goes to in the room. too overpowering. I would look for something softer or maybe a cool mirror and I would add color to the room with pillows and some colorful lamps. I also think woven blinds would look great. They add warmth and give a finished look. The color of your window treatments should contrast your wall color a bit, not match it or else it starts to look generic and blah.. You have warm walls, warm floors and the woven blinds, like Hunter Douglas brand would pull it all together for you.

Hello! If you have about 7' of continuous wall space, you could centre a small desk on the wall, then flank it with Ikea Kallax storage shelves. Use their Drona tote bins to corral messy stuff, and leave other cubbies open for the backpack, books, etc. Showing below the 48" wide Josephine desk from World Market - the front drawer can also flip open to come a keyboard shelf. Also comes in other colors. Also, the smallest Kallax shelf in their series (16 1/2" wide). Another possibility, depending on how the room is configured, is to butt the desk up to the foot of the bed. This should allow about 2' of chair space in front of the desk. You then might be able to use a larger Kallax shelving unit. They come in some great colors in the larger sizes - turquoise, pink, etc.