  The ground-state of an infinite-range Potts glass-type model with +/- J bonds
and unrestricted number of states is used to investigate coalition formation.
As a function of the q probability of +J bonds in the system it is found that
the r relative size of the largest cluster (a cluster being the group of
elements in the same state) shows a percolation like behavior. By a simple
renormalization approach and several optimization methods we investigate the
r(q) curves for finite systems sizes. Non-trivial consequences for social
percolation problems are discussed.
