In A Tale of Two Cities, by Dickens, what is the significance of so many "Jacques" in Defarge's wine shop?

With the significance of the wine shop owned by the
Defarges well established in Chapter V of Book the First of A Tale of Two
Cities, the gathering of the men known anonymously as "Jacques" represents
the emerging "hundreds of footsteps" that will soon march upon the Bastille, the symbol
of political oppression.

That there is an aura of
subterfuge and suspicion in the wine-shop is evinced by the actions of Madame Defarge
who coughs and raises her eyebrows significantly; also, after looking at some of those
who enter the shop, she takes up her knitting "with great apparent calmness and respose
of spirit" and becomes totally absorbed in it.

Further,
outside, the three Jacques peer with great interest into the room where Dr. Manette is
confined.  Ernest Defarge explains to Mr. Lorry that he shows Manette to a chosen few. 
When Mr. Lorry asks which few, Defarge replies,

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"I choose them as real men, of my name--Jacques
is my name--to whom the sight is likely to do
good."

Because Manette has
been imprisoned in the Bastille by the aristocrats Evremonde, Defarge's remark about the
Jacques also indicates that the revolutionary movement is in its incipience (i.e.,
beginning).