Being an Islamic country, Alcohol is banned but is available for non Muslims. None of the hotels have bars, though at some alcohol can be ordered as room service.
There is a liquor store on the main street though it's difficult to find it's best to ask your hotel, which should be able to provide directions.
Kawa
Quetta is well-known for its Kawa Green Tea and Shere Chai also known as Dood Pati Chai. Kawa has a unique flavor, and is usually served sweet, lemon and ginger powder are optional tastmakers.
Sharbat-e-Sandal
Is a sweet, non-carbonated drink unusually found in markets in summer. it has a good taste and a yellowish-green transparent colour - look out for the black seeds. served ice cold.