Everybody seemed to have a horse not just the regular gamblers, which event always brings out the biggest crowds to the sport?\nOptions:\n- race track\n- kentucky derby\n- american southwest\n- triple crown\n- horse derby
Step-by-step reasoning:
kentucky derby
The Kentucky derby is a horse race held annually in Louisville, Kentucky.

Kentucky derby is a very popular game and always bring out the biggest crowds.

Kentucky derby is a popular sport all around and bring out biggest crowd.

.

So, the answer is kentucky derby