Sigma Nu's Grand Chapter is bi-annual. In off years we *DO* have a national convention. It's called the College of Chapters. It's essentially like going to Leadership Summer Camp. The last one was in Lexington, VA. We stayed in the dorms at Washington & Lee. Very awesome to have this in the place that your fraternity was founded. Our IHQ is there as well as many monuments to our founding.
I don't know if any of ya'll would be able to relate to this at all but it was a really moving experience to be able to stand on the field that our founders met on and decided to form Sigma Nu and say the Creed of Sigma Nu...
I digress...
Yes, we have a national convention of some sort every year!