Paint the panelling, and the brick and get good lighting with LEDs in the 4000K range. replace the dining table with a couple of nice chairs and an end table.A bit more info about the use of the space might help.

Agree with Patricia.

Remove the very large dining table. Replace it with round table and 4 wheeled chairs.

Paint the paneling and brick a beige to go with the rug and the built in bar.

Remove all the stuff on top of the bar and replace it with bar and snack and drink accessories. Consider adding over head cabinets above the bar with glass doors and in cabinet lighting.

Consider replacing a couple of the door fronts with glass and lighting inside the cabinet.

Some larger art pieces and patterned table linens would add warmth and color. Since you have a suspended ceiling, there are hooks to use with it to hang things next to the wall. http://www.hangups.com/TBarHooks.html

The brick walls are a hindrance to the coziness of the space, in my opinion. Depending on your budget, you may want to consider breaking up the monotony by adding trim or wainscotting along the lower half the walls.

Also, that Batman Joker poster is pretty cool! We sell that very same item ourselves here on Houzz (along with hundreds of other great posters from comic books, classic movies, legendary bands, fine art, and lots more). Adding some posters to your basement walls is a great way to spruce things up for a minimal cost.

If you need any help with this type of home decor, please feel free to reach out. We're always eager to help folks with ideas about how to make a room more unique!

Brighten up the wall paneling with paint

Consider taking down the ceiling grid and exposing/painting the joists

Consider removing wall-wall carpet, use laminate or if the concrete slab is in good shape restore it

No matter the table, the chandelier must be centered.
Hang all the photos in a group, two inches apart, with the top ones just above eye level to an average adult.

Popcorn machine and drink area. A vignette of family photos. Get rid of the table cloth. You could paint the table if you don’t like the finish. It could be a great game and puzzle area. How is the lighting?

Paint everything white but ESPECIALLY the brick !!!! Center the table under the light and have fun ? Once it's all white ..it's going to be a beautiful room ...hang photos and paintings or posters ....

More lighting, maybe painting the brick a lighter color, and art, art, art on the big empty walls.

white wash walls and brick