Oh, my! Sounds like you work with a bunch of addicted bullies to me. In time, your not drinking will not be the "thing" to focus on, and they will drift off. You are right, they are not friends, they are co-workers, and you should not feel the need to behave like them to fit in. Do your job, and do it well, and it will all come right eventually.
Don't even reference this event on Monday, you were the bigger person, you stayed true to yourself. It's your job, not a social circle, so maybe try to avoid those situations in the future. Mistory5 has it right, these folks really don't want to look in the mirror.
Stay strong, you are doing a great job.
Merry Christmas!