The following certainly helps determine the origins of "speakeasy" and

"blind tiger." It's from the New York Press, 3 May 1897, pg. 2, col. 3:

The serving of liquor in coffee cups was said to have begun last night.

This is on the same level as the "Speakeasy" of Pennsylvania and the "Blind

Tiger" of South Carolina, and the authorities expect to have no trouble in

suppressing it.