  Multifiber optical spectroscopy has been performed on galaxies in the
vicinity of strong, nearby radio galaxies. These radio galaxies were selected
from the 3CR and B2 catalogs based on their exclusion from the Abell catalog,
which is puzzling given the hypothesis that an external medium is required to
confine the radio plasma of such galaxies. Velocities derived from the spectra
were used to confirm the existence of groups and poor clusters in the fields of
most of the radio galaxies. We find that all radio galaxies with classical FR I
morphologies prove to reside in clusters, whereas the other radio galaxies
often appear to be recent galaxy-galaxy mergers in regions of low galaxy
density. These findings confirm the earlier result that the existence of
extended X-ray emission combined with a statistical excess of neighboring
galaxies can be used to identify poor clusters associated with radio galaxies.
