"Bar philosophy"? Baloney. Philosophy has its own ideological perspective(s).
In practice, though, postmodernism (taken as a whole) most definitely has an ideology. So did logical positivism.
And even more in practice, if you go to a university to study philosophy, the philosophy department at your university will definitely have an ideological bias.
Continental philosophy is, in one sense, about the bias inherent in all thought.
One might say that analytic philosophy is about finding the bias free portion of thought, and judgments differ on whether they succeed.
Richard Rorty would be an interesting example of a critique of the second sort of philosophy in this context.