Many are tempted (as Terry seems above) to introduce various structures & sectarian qualifiers to the plain meaning of ekklesia as a function. (redeeminggod.com)
However, I think he's shifting categories, because he's using the term ekklesia in two different ways. (redeeminggod.com)
When they came to the word ekklesia in the Greek there was a decision to be made, and they chose to link that word to the building rather than the people that assembled within them. (redeeminggod.com)