Everyplace probably has good local brews....to bring it back to original topic....if I were able to be physically comfortable sitting still maybe I'd see something to be gained in zazan... but to me a major point to, and plus of, doing aikido is that it involves movement.
There are other meditation traditions that don't prescribe one specific sitting posture. In the Shambhala tradition, for instance, you can sit cross-legged, but you can also use a chair if that's what works for you. The point of the meditation isn't to torture yourself with a physically uncomfortable postion; on the other hand, this meditation practice (and zazen as well) do bring you into contact with discomfort in the larger sense, and help you develop tools for being present with discomfort rather than trying to avoid it or escape from it or numb it out. It's a very valuable skill.