  We study super Yang-Mills theories on five-dimensional Sasaki-Einstein
manifolds. Using localisation techniques, we find that the contribution from
the vector multiplet to the perturbative partition function can be calculated
by counting holomorphic functions on the associated Calabi-Yau cone. This
observation allows us to use standard techniques developed in the context of
quiver gauge theories to obtain explicit results for a number of examples;
namely $S^5$, $T^{1,1}$, $Y^{7,3}$, $Y^{2,1}$, $Y^{2,0}$, and $Y^{4,0}$. We
find complete agreement with previous results obtained by Qiu and Zabzine using
equivariant indices except for the orbifold limits $Y^{p,0}$ with $p > 1$.
