anyway to jazz up brown rice and black beans without adding meat?

Make black bean chili with winter squash or sweet potatoes, serve over plain rice -- or boulangere's cilantro rice -- http://www.food52.com/recipes/12661_cilantrolime_rice. Both are great recipes that would compliment each other well.
Have rice with the meal, make black bean brownies for dessert -- http://www.food52.com/recipes/search?c=1&recipe_search=bean%20brownies
Rice and beans is a classic combination and you will find many traditional recipes -- happy eating!

Truth is, you can add any vegetable you can think of that you'd like -- or any combination of veggies -- to your rice and beans. Once threw in some previously roasted potatoes and garlic, and it was heavenly. Wouldn't have thought about adding potatoes to beans and rice, but why not?

Caramelized onions or roasted, diced Hatch chile peppers.

Portabello mushrooms, chunked up.

We have rice and beans almost weekly. I love avocado and a fruit salsa. Also, a dollop of Greek yogurt. I like to roll it up in a corn tortilla too.

I'm a big fan of chipotle chiles in adobo sauce to add great smoky meaty flavor w/o meat. Just one from the can diced will add alot. Also corn or hominy will add texture variation that is nice.

Make it jambalaya-style. Sauté onions, garlic, bell pepper, celery. Add tomatoes, bay leaf, Worcestershire sauce. Season with salt, pepper, onion powder, garlic powder, dried oregano and thyme (Or a cajun seasoning blend if you prefer) and Tabasco sauce.

Add green onions, diced tomatoes and cilantro