95.7 WBEN-HD2 in Philadelphia has had the same playlist since the summer of 2007. They are a “rhythmic variety hits” format. I listened since I got an HD radio in 2006. They played some current rhythmic CHR hits. They added new hits often. Club Ben was one of my favorite stations back then.
In the summer of 2007 they just stopped updating it. You can hear some lost hits from 2006/2007 like Paula DeAnda - Easy, Pussycat Dolls - Buttons, Kat Deluna - Whine Up, Fergie - Glamorous, Akon - Smack That, Rihanna - Break It Off, etc. still in heavy rotation. But nothing newer.
I have been listening to this station since then and nothing has changed, they’re not intentionally doing a throwback format, they just haven’t cared to update it. I don’t mind it because 2006 and 2007 was a good time in my life, my freshman year of college. I’m hoping that they never change the playlist or get rid of the HD2, because I want my future kids to enjoy it too.