JM, as Randy has pointed out, it doesn't really appear that you have a serious problem. The couch appears in your diagram to be directly to the side of the open areas which apparently are a door and window, therefore pre-empting the ideal location for side surrounds(when back surrounds are also present), but if you mount them about 6' up at the front edges of the door/window, the distance they'd be in front of the listeners would be relatively small. If the couch could be moved a couple feet forward it'd be even better.
