The couple from the early 60s is about to do something fun, maybe dance or something else enjoyable. They definitely seem excited. On the right, the little martian with the gas mask is giving a fascist salute. Is there fascism in Mexico? There’s plenty of drug cartels, but apparently, fascism too. This could possibly be connected to how angry Americans deal with illegal immigration to the U.S., as Google suggests.
The martian, in any case, is carrying a lot of bombs in his belly. Some people smuggle coke pellets, which is dangerous too, but mostly just for themselves. Maybe the couple on the left has also taken something, a little hit or a line. Either way, they look animated and ready for a good time—Viva la vida!