  We show that in an L-annularly linearly connected, N-doubling, complete
metric space, any n points lie on a K-quasi-circle, where K depends only on L,
N and n. This implies, for example, that if G is a hyperbolic group that does
not split over any virtually cyclic subgroup, then any geodesic line in G lies
in a quasi-isometrically embedded copy of the hyperbolic plane.
