Question

Originally called _________, boogie-woogie was a style of piano playing deeply rooted in the blues characterized by the repeating left-hand pattern of eight notes to the bar.

Answer 1

Texas piano
Originally called Texas piano, boogie woogie was a style of piano playing deeply rooted in the blues characterized by the repeating left handed pattern of eight notes to the bar.

Answer 2

Barrelhouse music.

A form of piano music originally from Americas Deep South in the 19th century.