Based on the apparent number of seats and the curvature, the arena is relatively small. This rules out soccer and baseball (popular, or relatively popular in a number of Central and South American countries. The curvature seems to rule out Basketball as well since it is played in a rectangular court.
I strongly suspect that the arena it is a *advertiser censored* fighting arena.
The tight curvature is due to the small space of the *advertiser censored* fighting floor. Likewise, the limited number of seats corresponds to the need for the spectators to be close to the “action” (I never understood cockfighting, but can acknowledge that it is cultural in some areas).
Here is a photo of *advertiser censored* fighting arena in Central America. Note the similar small arena size and tight curvature. This arena, like photo 8, also appears to be only partially enclosed.
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