Those 50's chairs and that shag carpet are classic for sure and the colors are all a deep blue. You need something over the top in the opposite direction to balance the room. The BBC show "Changing Rooms" did a show once where they redid a bedroom and they used a teal and hot pink combination. At first it doesn't sound like the best, but the 2 cancel each other out and it worked.
I would say if all you do is add a band of pink or hot pink about 10" or 12" as a border at the ceiling or close to it, it would add just enough bright color to spruce up the room. It also would not entail alot of work.
Crayola should put out colors in naughty themes. Perhaps a Bar Theme "MOODS" collection. What would the colors be for Disco bars, punk bars, gay bars, sex clubs, etc. ? lol It would have to include several shades of Black. smokey black, purple-black, blue-black, red-black, intense purple, violent red, urine yellow, psychotic metal blue, silver, to name a few.