In Sigma Nu, the only folks besides the Brother eligible to wear the badge are his mother, wife, sister, fiancee or daughter. If you get *engaged* it's appropriate to pin the girl. If you're just pre-engagement, you opt for lavaliering.
Since my undergrad chapter has only been around since 2002, they don't really have much of a tradition here that I'm aware of, although different guys have done it in different ways.
A good story:
One of our brothers had been dating a girl for awhile and never really taken her on a real *date*. So, he took her down to Bricktown (nice area in OKC, lots of restaurants, bars, clubs, etc... and a riverwalk). Nearly the entire chapter came down (she had no idea). They walked down one side of the riverwalk at the appointed time. We serenaded them with Green Day's "Time of Your Life" -- I played the violin solo on my violin (what else would I play it on?).
That's probably the best lavaliering story I have anyhow.
Whenever we could work my fiddle into serenades, I was a popular guy on campus for a few days afterwards
