Tawaif - a highly skilled courtesan (skilled in: music, dance, poetry, and singing) who catered to nobility in South Asia. Similar in respects to Geisha in many ways, including that sex was NOT obligatory. It occurred, but the primary function was entertainment.
Most commonly romantic poetry like Ghazals -a form of Arabic poetry that made its way over to South Asia: odes of long lost lovers, tragedy, separation, stuff to pull at your heart strings. And, shairi, another Arab/Persian kind of poetry that is built on monorhymed quatrains or four sixteen syllable lines (keeping to the same rhyme scheme) with a caesura used between lines 8//9 to break up the first half from the second. During the British Occupation, they were simply called, Nautch girls or dance girls. But this is far from all they did or were capable of. The name itself, Tawaif, is the term for a HIGHLY SKILLED courtesan. They were trained to the upmost of artistic forms.
They were not there to perform sex acts - that was often incidental and not contractual. And the women had the power to rebuff men's advances.
The Tawaifs of India were regarded as some of the greatest performing artists of their time with documented praise and examples from travelers such as Xuanzang, a Chinese pilgrim, notable traveling Buddhist Monk and scholar who frequented India, remarking on the Tawaifs skill, beauty, and performances during once such visit to the Sun Temple in Multan. Al-Biruni, often regarded as the father of Comparative Religion studies, an Iranian polymath and scholar, regarded on their skill and larger numbers during the 11th century CE upon a visit, Ganikas, another entertainer, are a public dancing girl (very common in cities from the Vedic period upward) who received classical arts training (most obviously dancing) and often performed from public settings up to royal private ones - and would compete to become Nagarvadhu - the most beautiful woman and most highly talented in forms of art (dance mostly).
Many young girls would leave or were taken to be taught these skills, and yes, there were schools for this too as well as private tutelage. People don't often realize this, but Ancient India was a place of extreme learning with all kinds of schools for different disciplines. A place of academies. Something I've talked about, like places like Nalanda, the world's oldest residential university that attracted people from far as Greece to Japan.
Anyways, Tawaifs were so successful and sought after, that records show they were consistently among the highest tax payers. Records also show that their wealth was used (by their consent/given) to help fund rebellions against the British Raj - enough so that the British passed laws to strip them of their ability to work as courtesans and left them only with sex work, which is sadly why some stories today only speak of them as prostitutes and not knowing their full, complex, and impactful history It's said the art of all this came from Urvashi, an Apsara (celestial being of dance, song, seduction/temptation, art, music).