Here are some fun things to do in OKC for the adults:
-Casinos- they're everywhere
-Bricktown- Downtown area with bars, a riverwalk, and plenty of dinning
-NBA game- the OKC Thunder are AMAZING! Check them out if you can
-Uptown neighborhood- plenty of bars and restaurants
-The Paseo District- Arts and culture district with bars, shopping and good eats
- Golf

Here are some fun things to do in OKC for families:

-Bricktown/Boathouse district- Downtown area with a riverwalk, restaurants, Brickopolis, and head over to the boathouse for fun play

-NBA Game- the OKC Thunder are AMAZING! Check them out if you can

-Science Museum- kids can climb and touch anything

-Orr Family Farm

-Blue Zoo Aquarium

-Okana indoor waterpark (they have daypasses)

-OKC Zoo

-Six Flags-Frontier City

- There are also tons of indoor kid zones and outdoor parks