The WB has flourished on the strength of such well-received dramas as “Buffy, the Vampire Slayer,” “Dawson’s Creek,” “Charmed” and “Felicity.”

Now, “Zoe, Duncan, Jack & Jane” marks the fledgling network’s latest attempt to launch a sitcom that is, well, funny.

“Zoe,” which debuts at 9 p.m. Sunday, does manage to achieve this modest feat, at which such past offerings as “Kirk” and “Brotherly Love” and such current WB “comedies” as “Smart Guy” and “Jamie Foxx” have failed miserably.

The biggest problem with “Zoe” is that it apes one of the greats, not much of a sin in today’s TV world.

Set in Manhattan, the series centers on Zoe; her longtime platonic friend, Duncan; her best friend, unlucky-at-love Jane; and Jane’s wacky twin brother, Jack. They self-centeredly chat about their problems in their apartments, at school and in a coffee shop.

Can you say “Seinfeld, Junior?” Sure. I knew you could.

That’s not to say that just because “Zoe” isn’t original, it isn’t funny. In the debut episode, Zoe strikes up a conversation with Montana Kennedy (played by Scott Foley of “Felicity”), after whom she has lusted from afar. She thinks he asked her out, but every time she sees him, the details get drowned out by urban background noise. So, in order to get closer to him, she befriends his hostile, handicapped sister.

Also, Duncan decides that Jack’s attraction of women is exclusively because of the wingtip shoes he sports. So Duncan offers to trade anything he owns to Jack for the shoes.

And (gasp) Zoe’s mother, Iris, is dating a pilot with one, continuous eyebrow.

The central cast of unknown actors, Selma Blair as Zoe, Michael Rosenbaum as Jack, David Moscow as Duncan and Azura Skye as Jane, are intriguing, and Mary Page Keller (“Life Goes On”) is winning as Iris.

Sure, “Zoe” doesn’t exactly mine the same comedic material as “Seinfeld.” Teen-agers are supposed to be self-obsessed and overly dramatic. Jerry, George, Elaine and Kramer should have outgrown that, but never did in the “Peter Pan” realm of “Seinfeld.”

Still, while it’s no classic, “Zoe, Duncan, Jack & Jane” is a pleasant diversion for those who want some laughs on Sunday. That’s more than the series it replaced, “The Army Show,” could ever claim.