MCM Baycroft - Approve Disapprove
I'm not in to painting brick, but here it is painted white and has the dark wood mantel - combined with dark beams and medium dark floors. It still fits the MCM style but can also be many others based on the furniture and plants you add. Also, note the lights - it's a great way to bring light across the entire space without doing anything crazy.
Fancy, bright, MCM.
White ceiling, dark beams, light wood floor, brick fireplace surround. It's comfortable, homey, and still hits the MCM vibe.
Too modern? Imagine it with some plants and some of your personal effects out, along with slightly more decorative stools.
Example of white ceiling, dark beams, wood walls
Ignore the vanity (I know you don't like wood vanities - or at least this style of them).