Refers to a geisha, a traditional Japanese female entertainer. This single-character form is relatively rare in modern standalone use; more commonly seen in compounds like 芸妓 (geigi) or 舞妓 (maiko).
In Kyoto's geisha districts, you can still see geisha today.
geisha
famous geisha; celebrated geisha
pimp; brothel tout
brothel
brothel; licensed pleasure quarter establishment
The kanji 妓 originally referred to a female performer or entertainer. The reading ぎ is the on'yomi. The standalone use is now rare, with the character more commonly appearing in compounds.