For the average wedding, if you're a guy, a good shirt, good
pair of jeans, good leather shoes and a nice watch, style your hair
can liao. Please don't show up in a suit unless you're immediate
family member of bride and groom. Imho looks very uptight.
If you're a girl, accessorise well, matching shoes and dress,
maybe a good shawl, and high heel shoes can liao. No excessive
plunging neckline or parrot eye make up. Style your hair.