After coming across post #1094312,it raises the question-
What exactly is the criteria for formal?
From the wiki:
A scene characterised by characters wearing suits, dress shirts, dresses, gowns, vests, slacks, and dress shoes.
Are we limited to strictly formal occasions only?
A couple more examples where it's not strictly formal:
post #1090827
post #1087080
post #1086494
Opposed to a scene where all the characters dressed as such:
post #1086419
post #1080519
post #1077024
Maybe some distinction could be made,depending on the number of subjects present in the picture (solo or >1)
Edit:
I noticed we have a casual tag as well
Updated by alegria