Listen to ska! It's got quality hooks, a lot of variety within the genre, and in all likleyhood your friends haven't even heard of it. It's similar to a quick rock/reggae mix.
A few people know Reel Big Fish if you want to use them as a starting point, but I would reccomend any of Streetlight Manifesto's albums also. I'd also reccomend different bands based on your taste. Maybe Suburban Legends if you like pop stuff. The Cat Empire if you like the indie scene. Op Ivy, Rancid, Mu330, Catch 22, The Mighty Mighty Bosstones (!) any related artists if you like punk/harder stuff. The Skatalites are pure jamaican ska. Mephiskapheles if you like any jazz. And that's just a few ska/ska related bands.
Imagine the look on your friend's faces when you come back listening to a genre that's even beyond their musical knowledge.