OK, let's start at the beginning. How many people are going to need to sit in the living room? Do you really need a table that seats 8? i think you need to ask yourself some critical questions about how your family or you will use the space. Living in it for a minute might help that. The front door area is much too small to be a living room of sorts. The best I can see in that space is maybe two chairs but it still cutting up the whole flow of the front area, that should really just be an entryway. You said no tv in here, is there another space for that? Or are these the only functioning living areas? Is the door in the kitchen to the garage or to a laundry area or pantry?

If the room is super narrow, I'd put the TV on the wall between the kitchen doors, couch opposite it under the windows (don't set it right against them- leave some space for the heating) and get some light-blocking curtains if the glare is an issue during the day. If space allows, you could square up your entertainment stuff on the shell wall, put your couch opposite it, but place it about 2/3 of the room away from it. Depending on the width of the room, your MCM chairs could be angled facing the couch conversationally or both placed under the window side by side.... lots of things you can do! You can put your put the piano on the wall by the kitchen with a LARGE colorful (or black and white if that's what you love) art piece hung over it to make a statement. Doesn't have to be expensive- grab a 20% off coupon for bed bath and beyond 😜! And you still have for an entryway built-in by the door if you want. Your bookshelves might be able to go by the front door. 🤷‍♀️

Nancy, I am blown away by the idea to include elegant bar seating... I absolutely love this idea, i think it's a clever way to use the space and include additional seating!!

I've been managing vacation rental properties for 18 years, so first, I'd want to know the maximum number of guests you can sleep here. For starters, in the "day room," do you think people can see the lake itself if they're seated there in regular chairs? If not, you may want to consider a bistro table and chairs at one end to give people more of a perch. At the other end build in an "L" shaped bench that is high enough to afford sight of the water when one sits there. Add a custom table with it for a spot to set down drinks or to play a game of checkers. In the main room, place TV on one of the walls left of the FP. There would probably be less glare if it were immediately left of the FP and not opposite the windows. Seating will depend on the number of guests who may want to sit together to watch a game, etc., so the numbers will help determine what you should do about seating.