Milhouse, is it your belief that the board of a co-op or condo can enact a bylaw prohibiting residents from praying in their home?
Yes, absolutely, unless the state has a law preventing it.
Can a co-op or condo permit Christian prayer but prohibit Jewish prayer? Could they only permit Christians to purchase a residence in the co-op or condo but prohibit Jews from joining?
No, that would violate the law against discrimination in housing.