The one thing that definitely would not happen — not that it wouldn’t ever happen on an individual basis, but it certainly wouldn’t happen in a shared-culture sense — is that a generation of college kids would go down to Cabo for the week and return with a big Mexican dance hit which they then played so much that it became even somewhat popular in the US. Americans abroad tend to be so insular that a typical partier could spend an entire Spring Break on foreign soil and never once hear music they didn’t bring with them.
I have one memorable, anecdotal data point to the contrary! It involves a college freshman coming back from a spring break trip to Mexico, wearily putting down his suitcase, gathering together everyone in the vicinity, and giving a bug-eyed, alarmist speech worthy of Gandalf or Churchill: “I have to warn you about something. It’s coming. There is nothing any of you can do to prevent it. You have to prepare yourselves for it. It’s called the Macarena.”