Hola Reynold

The noun "tablao" is a Spanish noun that comes from "tablado"; this is the "stage" (the wooden platform) where flamenco shows are performed. In Andalucía and other parts of Spain there is a tendency to drop the consonant -d in some words that end in -ado, -ido, therefore tablado becomes "tablao". 

Here's a bit of information about this, have a look here. 

Saludos

Inma