You don't have to socialise with co-workers, but if you don't have many friends it's a good start. Interacting with other people, improving your social skills, learning and sharing from/with others all help you grow as a human and find your place in the world.
Suggest an activity not involving drinking that would like to do with others instead.
Just spending time with them without drinking? It's not a difficult concept. Why do you require alcohol in order to interact with others?
But why do I need to spend time with others at all? Work is for working, I don't go to work to make friends or socialise.
You don't have to socialise with co-workers, but if you don't have many friends it's a good start. Interacting with other people, improving your social skills, learning and sharing from/with others all help you grow as a human and find your place in the world.