The line you quoted is actually:
**"Let us go then, you and I,
When the evening is spread out against the sky
Like a patient etherised upon a table;
Let us go, through certain half-deserted streets,
The muttering retreats
Of restless nights in one-night cheap hotels
And sawdust restaurants with oyster-shells:
Streets that follow like a tedious argument
Of insidious intent
To lead you to an overwhelming question...
Oh, do not ask, "What is it?"
Let us go and make our visit.
In the room the women come and go
Talking of Michelangelo."**
The line "Fat black bucks in a wine barrel room" doesn't appear in the poem. However, the reference to "Let us go then, you and I" and "In the room the women come and go" is what likely led you to the incorrect memory of the line.
Perhaps you're thinking of a poem that was inspired by Eliot's work, or another poem entirely. It's always best to double-check your memories of poetry, as details can easily be misremembered or misattributed.