I somewhat doubt I am unique in this...but I don't have "triggers".
I drank when I was happy.
I drank when I was sad.
I drank when I was anxious.
It just didn't really matter. I just drank. Socially, hiding alone in my office, sketching at the beach, or putting the finishing touches on a piece.
Didn't matter.
Pretty much anything could be a "reason" to drink. A party. A birthday. Dinner. Lunch. Saturday.
Probably not what you were after...but, it's my experience.