In the USA hot spicy foods are now mainstream. 40 years ago there were very few Mexican restaurants outside the southwest. Then came the success of the chain Chi-Chi's, where many of us first tasted jalapenos on nachos, and margaritas.
Ah...Chi-Chis...a Mexican restaurant whose name means tits in Spanish. I bet the Mexicans living here laughed every time they drove by one, the same way I laugh every time I pass an accounting firm here named "Sackrider and Company". That was my favorite restaurant when I was little, before I knew what real Mexican food was. I used to go there for my birthday every time. A division of Chi-Chis is still in business here named Tumbleweed. I don't think they're all over the US but there's one about 10 miles away from me. The food is really bland Americanized and watered down Mexican food. Their steaks are ok but their Mexican/Tex Mex food is pretty awful, and yet still more expensive than real Mexican restaurants. Go figure...