Hi and welcome to SR.
In terms of the socialization at work/after work... you have choices... you can go along and not drink, go along and drink, don't go... if you choose to go along have a plan in place for not drinking. To ease the questions, choose a suitable substitute beverage that everyone will think is alcoholic but isn't. For instance, instead of rye and coke, just have coke. Beer is a tuffer one... although in Canada we have non alcoholic beer.
In terms of socialization outside of drink, remember 2/3 of the population doesn't drink, so you just have to reorient your interests to other areas. Musueums, art showings, car shows, etc. where alcohol isn't part of it.
Peace, Levi