Or maybe your understanding of the question leads you to assume a false conclusion.
The Church which is doing the most for the poor is not the Church which is closed except on Sunday. It's the one with the open doors. It's the one with Servants who take vows of poverty so that they are not encumbered with worrying about finances and offer their entire lives to the poor.
Maybe you work and your spouse is free to offer time and talent to the poor. Maybe you provide offerings to small mission projects so that they'll have finances to afford to pay a preacher or a Priest. Perhaps you are rich and you give large amounts to ministry.
Now, about the total number who attend church of some sort here in my County. On any given Sunday, about 70% of the total population is in a worship service.