  We simulate black hole binary interactions to examine the probability of
mergers and black hole growth and gravitational radiation signals using a
specific initial distribution of masses for black holes in globular clusters
and a simple semi-analytic formalism for dynamical interactions. We include
3-body recoil and the latest results in numerical relativity for gravitational
radiation recoil. It is found that while 99% of binaries are ejected from low
metallicity, low mass clusters; metal rich massive clusters retain 5% of their
binaries. An interesting fraction of the ejected binaries, especially those
from high mass, high metallicity systems, merge on timescales short enough to
be gravitational radiation sources during their mergers with rates approaching
those expected for galactic field black hole binaries. While the merger rates
are comparable, the much larger mass of these binaries and their localization
will make them appealing targets for advanced LIGO. We single out two possible
Milky Way clusters (NGC 6441 and NGC 6388) as having the properties for a good
probability of retention.
