The woman was shot in the head during that argument at the OST Lounge on Old Spanish Trail.
Police say she was only grazed by the bullet, and is expected to survive.
Woman shot during fight at lounge on Houston's south side
This all began around 4am after a fight inside the club near the South Freeway.
That argument spilled over into the parking lot, and that is when the woman was shot.
A man and a woman are believed involved. They took off in a gray Chrysler 300, and police are now looking for them.
The woman who was grazed in the head is expected to survive.
Stay with ABC13 Eyewitness News for the latest details on this developing story.