The weekend program in which we participated focused on meditation, yoga, temple food and seonmudo (선무도 - 禪武道), a Korean seon (zen) martial art. It also included tea ceremonies, hiking and archery.
I was surprised by the number of foreigners at the temple-stay program; of the 30-some weekend participants, over half were European. The largest group was from Germany—there were more German speakers than native English speakers—and there were also a handful of Frenchmen and Americans.
I think for many of them, as for me, the temple-stay was not about anything religious—we couldn't understand most of the esoteric explanations anyway—as much as it was about relaxation, vigorous exercise, reflection and interest in traditional Korean culture.
Did I mention that our instructor was a friendly Norwegian fellow who spoke Korean more fluently than I do?