Out on the course and hundreds of yards between the groups, I don't see a problem. BUT...
Back at the club house it's a different thing altogether.
Try showing up without a t-time in a Harley Davidson t-shirt with blue jeans and you're not likely to get on."sorry, sir, we're all booked up today". Try it waring a collared shirt and slacks and they'll usually find a spot for you. At the 19th Hole after the round, good service could be a problem. Chit Chat with the other groups and you may find a cold reception. Rules or not, Eticit (sp?) should apply on and off the course. You would'nt ware a tux to a nude beach!
Cover-alls to a wedding!
IMHO
Keith