(Isa 4:1) And in that day seven women shall take hold of one man, saying, We will eat our own bread, and wear our own apparel: only let us be called by thy name, to take away our reproach.

Literal: If we read this in the context we see that this refers to the "daughters of Jerusalem" or women of the previous chapter 3. However, I would like to look at it from the perspective of the New Jerusalem or Church.

Pessimistic View: The "seven women" are the complete religious system who are only concerned with being "called by thy name" (the "one man" being Jesus, and being named Christians). "Bread" refers to the word of God. The religious system is only concerned with eating their own bread and refuse to teach/preach the full gospel. They "wear our own apparel" refers to self righteousness, rather than putting on Christ. And reproach has to do with barrenness, or inability to reproduce; it also can refer to being husbandless (not married to Christ).

Optimistic View: Everything is the same as above, however, the seven women are the bride of Christ (ala the 7 churches of Revelation married to Jesus). The glorious Bride with some spots and wrinkles. His blood washes away spots and His fire/heat gets the wrinkles out like a hot iron.

I am an optimist, but from what I see in the church world, I have to lean more towards the thought that these seven women represent a corrupt religious system, Jezebel, Harlot, etc.