The walls and wall lights are working well. Is that IES you're using for those ? And the chair looks like a decent enough model from what we can see of them.
But you are lacking some details that would give it a more realistic feel.
It really is very rare that a room has no skirting or coving of some kind...
The translucent curtain doesn't look like one because there are no folds / creases / variation apparent in it.
What is that thing on the wall on the right ? We don't have enough detail in it to show the viewer what its function is. If it's a desk, it needs stuff on it, if it's air conditioning, it needs a plug and wire etc. Otherwise you risk making it look like an inexplicable 3D block in a scene.
No mat or rug is ever perfectly straight on the floor, and / or perfectly flat and uniform throughout. And it's very thick for a vinyl mat, yet lacks any visual detail to tell us it's a carpet if that's what it is...
There is no dirt or wear or variation on any object in the scene, which is making it look very sterile, and not adding to realism. The floor particularly looks like it has never seen a footstep and is a good deal shinier than floors in meeting rooms usually get.
Where are the electric and data sockets / phones / pens / pads / easels and other things typically found in meeting rooms worldwide ? Adding some of these will subconsciously justify the space as a viable meeting place, and add realism that way.
It seems unusual to have no overhead lighting for the main table, yet to have the featureless walls brilliantly lit by multiple spotlights...
Lastly, no offence, but it's quite a dull room, which not very much visually engaging in it. That's not to say it's badly done, but if it's a portfolio piece, I would have thought you need to produce visually exciting work that will jump out at potential clients from the hundreds of reels they will invariably review all the time. I just thinking we're lacking a little 'wow factor'.
I would add some high detail plants maybe, and / or put interesting / practical objects on the table and other surfaces or maybe some pictures on the walls - something to attract the eye and hold the attention. And maybe adjust the camera angle so we can see more of the glassy desk reflections, which I'd bet are more visually arresting than the walls.
Hope that helps.
CBR