This image shows several reenactors inside the cantina, dressed and armed in the style of the 1800s, though with clothes and weapons of a somewhat later time period than the original setting of 1836.
The description states:
Curly’s famous Cantina located in ALAMO VILLAGE, 7 miles North of Brackettville, Texas on the Shahan Angus Ranch, where the best food in town is served and the toughest outlaws hang out.
–Curly is presumably the bald man behind the bar, the name apparently referring to his long sideburns. While the description of the customers refers only to outlaws, the grey haired man to the right of Curly is wearing a star indicative of a lawman.
The signs also indicate drinks not typical of the time, as the cantina was also intended to be an active restaurant for tourists as well as a historical presentation.
This image likely dates from the 1960s.