If I may add my story...
I was serenaded not by a chapter but by two PMA's. Each from different chapters.
The story goes like this. I was living here in the city( San Francisco) and a long time friend from back east (Nashville,TN) was coming to the Bay Area for a physics conference for African American college students. The conference was being held at CAL. My friend is a Phi Mu Alpha charter brother from Grambling State U. Anyway, he happened to meet another physics student who was a PMA from a chapter other than his (I don't know which one but it was at a HBCU). The two of them got together and practiced songs. The sponsors of the conference decided to have a Deejay'ed (sp?) party for the students. And at this party, the two of them got down on their knees and sang
what may have been the Phi Mu Alpha sweetheart song. Yes, I gushed, and blushed! It was the sweetest thing ! Everyone there (about 80 to 100 people) was staring and I felt like the princess of the party!