  We consider a self-interacting, massive scalar field (non)minimally coupled
to new massive gravity in three dimensions. For this model, we first derive a
family of black hole solutions depending on a unique integration constant and
parameterized in terms of the nonminimal coupling parameter. Imposing the
absence of naked singularities restricts the parameters in such a way that the
field vanishes at infinity and fixes the metric to be asymptotically AdS.
Within this family of solutions it is possible to find a black hole supported
by a minimally coupled scalar field and therefore the existence of these
solutions is not inherent to the presence of the nonminimal coupling. The Wald
formula for the entropy, being proportional to the lapse function evaluated at
the horizon, yields a zero entropy in spite of the fact that the solution has a
non zero temperature. As a consequence, the unique integration constant may be
interpreted as a sort of gravitational hair. As in the source free case, we
show that the same field equations admit as well asymptotically Lifshitz black
hole solutions in a different region of the space of parameters. These Lifshitz
solutions are divided in three families for which all the parameters entering
in the action may be expressed in term of the dynamical exponent.
