  We find the gravity duals to an infinite series of N=3 Chern-Simons quiver
theories. They are AdS_4 x M_7 vacua of M-theory, with M_7 in a certain class
of 3-Sasaki-Einstein manifolds obtained by a quotient construction. The field
theories can be engineered from a brane configuration; their geometry is
summarized by a "hyperKaehler toric fan" that can be read off easily from the
relative angles of the branes. The singularity at the tip of the cone over M_7
is generically not an orbifold. The simplest new manifolds we consider can be
written as the biquotient U(1)\U(3)/U(1). We also comment on the relation
between our theories and four-dimensional N=1 theories with the same quiver.
