I tried to sit with some Christian meditators, and found that Roshi was right, it would only confuse me. The sit is preceded by a talk about how and why to do it. Talk. Ick.
Now that I am swimming every day to regain my lost fitness, I am finding a wonderful practice opportunity. In that warm pool, with rythmic movement and breathing, it is possible to replicate that "in the present moment" experience of the zendo, with the added bonus that it is very good for my body. There is no pain to content with, only boredom. A much easier pull, really. Wallowing meditation. I can do this.