Well my dear, as long as you were being appropriate and having fun... why the guilt?
Ask yourself this question.... Why is there alcohol provided at weddings? Solely for the flavor?
In my opinion it is not to get fall down drunk, but to be available to settle nerves, and loosen people up for socialization with people they don't know very well--- so that they can dance and interact without being uptight or too shy. Some people do not drink, that is cool, but it was an acceptable practice on this occasion and it worked!!! You spoke to poeple, danced, and did what they wanted you to do- have fun!!!
No worries.