I loooove basement bar/entertainment kinda stuff, so apologies in advance if this is long-winded:
Move the bar over so it's not blocking the fireplace. You could probably find a better spot for the popcorn machine, too. It's kinda hidden back there.
If you can find another bar table like the one you've already got, move them between the bar and the pool table. In the location where the table is now, snap up a couple billiard spectator chairs.
I'd move the pool cue rack to the wall that the TV is on, mounted between the two doors (and sitting maybe a little lower). It works as an "accent" for the room. Don't hide it where it is.
If you're really looking to go old school bar, I would almost ditch the piano in favor of a juke box. I'm ceaselessly amazed by the shit people sell on Facebook Marketplace. You can find some great stuff in there for cheap because a lot of people have no idea what they have.
As far as the walls go, have you considered wainscot and a chair rail? Try to find a stain or color that compliments the brown doors and trim. Painting the top half of the room some kind of dark green would look bad ass, IMO.
Oh — and hide those TV wires in the wall.