SAQI: Arabic/Persian/Urdu for a person who serves water and drinks to thirsty people. It also refers, especially by poets of the East -- like Omar Khayyam, Ghalib and Iqbal, along with their successors (Me being one); to an extraordinary beautiful veiled woman, who serves drinks to the lovelorn, the heart-broken and the dejected and deprived men and women of the world.
The saqi is this poem, as in several other poems by me published here, refers to a very special lady who owns a tavern and who has renounced the world and its temporal, short-lived pleasures and comforts for "gaining true peace and love of God" by serving and comforting the grieved ones who visit her at her tavern. I shall not reveal more :)