  We consider warped AdS_3 black holes in generic higher derivatives gravity
theories in 2+1 dimensions. The asymptotic symmetry group of the phase space
containing these black holes is the semi-direct product of a centrally extended
Virasoro algebra and an affine u(1) Kac-Moody algebra. Previous works have
shown that in some specific theories, the entropy of these black holes agrees
with a Cardy-like entropy formula derived for warped conformal field theories.
In this paper, we show that this entropy matching continues to hold for the
most general higher derivative theories of gravity. We also discuss the
existence of phase transitions.
