If there was ever a show that made me laugh half as hard as Seinfeld, it' be this one...
There's a British show called Coupling (yes, there was an American version of it BRIEFLY, but this one is MUCH better). It has elements of Friends in it, but half the show is 3 guys having conversations a hell of a lot like Jerry, George and Kramer.
The first episode actually seems to be a lot like an old Seinfeld plot (the girlfriend won't accept being dumped). You can find the episodes online, and I think it might still be showing on PBS somewhere at some time.