Lets see, I have heard a few rumors, but not sure if any of them are true or simply made up stuff:
If you bang a broad on stage at the Greek Theatre you will marry her;
That Huey Long used to have special moonshine made at the old campus sugar plant;
That if you walk through a sequence of doors in Nicholson Hall a certain way, you will ace the class you take there;
That on certain nights of the year you can see an Indian child and her dog on the Indian mounds - they disappear as you approach them;
A worker who robbed houses in University Acres stashed a large horde of jewelry in the walls while building the 'Cow Palace' - the police were searching cars and he had to - but it was never found and still there today;
University Lake - just out from Baton Rouge Beach was the location of a small cemetery prior to being converted into a lake. The graves are still there underwater and sororiety girls have reported sightings at dusk;
There was a beer (Tiger Beer) made in the 1930's for the first live LSU mascot. A truckload was sent from Manhatten Brewery in Chicago to Huey Long. Al Capone owned the brewery. Today only a single Tiger can is known to exist - found on a bar shelf down from the brewery in Chicago. It reportedly recently changed hands for over $100,000! (Google it if you do not believe.). Here
In the late 70's there was an 'official' unofficial network (including a booklet) of coeds willing to get extra 'tutoring' to improve their grades. Reportedly, a woman teacher even took 'advantage' of the service.
Not sure if any of these are true or not, but you wanted legends ...
This post was edited on 11/13 at 10:06 pm