Is there a difference between sitting alone and sitting together?

I've noticed that attendance at the Saturday Zazenkai when it is live is limited to at most a handful of people. It seems that nearly everyone here does not find it worthwhile to take part in this at the same time as other people. Is it because the on the web there is not much of a difference between the live and the pre-recorded version? Or that people see Zen Buddhism as an individual activity, or an intellectual hobby?

I experience a big difference between sitting with the Zazenkai when it is live compared to when it is pre-recorded. Maybe this reflects on some emotional need I have, or some throwback to feelings of community when I have been to church, but on the other hand most religious groups I can think of seem to value some sort of shared ritual.