There is the Courtyard/Brickstone, which is an old hotel that Marriott bought and remodeled into a Courtyard, which is really nice and priced right...ands there is always the Worthington, which is a bit nicer.....there is a Spring Hill suites within walking distance, too.
You got PLENTY to do to make an overnight stay worth your while......Sundance Square is hoppin at night...weekends there is a fabulous improv comedy show called "Four Day Weekend" that does two shows nightly, check their website, these guys are hilarious.......bars/reataurants galore....and depending on what day, there are great museums, the water gardens, and artsy-fartsy things to do. Check the website for "Bass Hall" for the night you are there, they have great shows ranging from the Ft. Worth Symphony all the way to Lyle Lovette, and everything in between. Downtown Ft. Worth is very pedestrian friendly, and there is always the trip to the stockyard area.......IMHO, downtown Ft. Worth is pretty darned good.
Take the trip and enjoy.