  We present a work which is meant to inspire the few-body practitioners to
venture into the study of new, more exotic, systems and to hadron physicists,
working mostly on two-body problems, to move in the direction of studying
related few-body systems. For this purpose we devote the discussions in the
introduction to show how the input two-body amplitudes can be easily obtained
using techniques of the chiral unitary theory, or its extensions to the heavy
quark sector. We then briefly explain how these amplitudes can be used to solve
the Faddeev equations or a simpler version obtained by treating the three-body
scattering as that of a particle on a fixed center. Further, we give some
examples of the results obtained by studying systems involving mesons. We have
also addressed the field of many meson systems, which is currently almost
unexplored, but for which we envisage a bright future. Finally, we give a
complete list of works dealing with unconventional few-body systems involving
one or several mesons, summarizing in this way the findings on the topic, and
providing a motivation for those willing to investigate such systems.
