  We describe a construction of Schottky type subgroups of automorphism groups
of partially cyclically ordered sets. We apply this construction to the Shilov
boundary of a Hermitian symmetric space and show that in this setting Schottky
subgroups correspond to maximal representations of fundamental groups of
surfaces with boundary. As an application, we construct explicit fundamental
domains for the action of maximal representations into
$\mathrm{Sp}(2n,\mathbb{R})$ on $\mathbb{RP}^{2n-1}$.
