I have fond recollections of Weldon's cafeteria on Main Street in Houston. Until Sharpstown Center opened in 1961, my family drove to downtown Houston to shop. (We continued occasional trips downtown even after Sharpstown opened.) Weldon's was a frequent stop, although we sometimes stopped at Alfred's in Rice Village or Felix's (either Kirby or Westheimer locations). Here's a photo of the interior. You see the upstairs and downstairs dining rooms. The serving lines & cashier's stand are just visible beyond the stairs & balcony.
I found this blog which gives more info on Weldon's and the recent history of the building. I'm glad to know the building is still standing.