House rent to pay.
Gin on Saturday,
Church on Sunday.
My God!
Babies and gin and church
And women and Sunday
All mixed with dimes and
Dollars and clean spittoons
And house rent to pay.
Hey, boy!
A bright bowl of brass is beautiful to the Lord.
Bright polished brass like the cymbals
Of King David's dancers,
Like the wine cups of Solomon.
Hey, boy!
A clean spittoon on the altar of the Lord.
This allusion references passionate worship with dancing and clashing cymbals.  The dancers of King David were particularly jovial. 
 Church was important not only to Hughes, but also many slaves immediately following emancipation (as well as before).
Brass Spittoons