  Let $G$ be a noncompact semisimple Lie group, $\Gamma$ be an irreducible
cocompact lattice in $G$, and $P<G$ be a minimal parabolic subgroup. We
consider the dynamics of $P$ acting on $G/\Gamma$ by left translation. For any
infinite subset $A\subset G/\Gamma$, we show that, for any $\epsilon>0$, there
is a $g\in P$ such that $gA$ is $\epsilon$-dense. We also prove a similar
result for certain discrete group actions on $\mathbb T^n$.
