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.

'Supreme" chairs come in dazzling colors.I flipped for them when in Kerala but bought them while at Vijayawada. They are available anywhere and are water resistant, strong and too cute to look at. I am yet to find a table to pair them with but will do so soon. red,lime green,black,white,brown,blue,yellow...my god.The colors and their vibrancy is awesome.Many more colors as listed are available.

Thanks everyone, I'm planning to get my floor tiled up soon, and then later the whitewash. So before all that, I wanna do away with the construction part, if required to transform this hideous corner. I had the roller blinds in my mind to hide these iron windows, but I will also look at options for changing them windows entirely if budgets allow. I might have to use some false ceiling work as well. Posters, I don't think can find space here, but a lounger sofa-bed is a surething with some nice lights. Please do share some pictures of the lights and loungers and floor tiles if you may, for suggestion. I'll be obliged. Thanks again!

Install vertical retractable louvers. Use them in the evening time. They will be floor (and lintel level slider) mounted and also they are movable. So nobody will question you.