At UT, there was a goign away party for a teacher that I did just what you are talking about.
Though, I didnt give out cards, I did email the director and said directly- I have my own camera , and am a paid photographer-
showed her my pictures/site
and said, -If you want me to do it, (take the pictures for the newsletter) just let me know, and I will be there.
Of course, I dont have many years experience, just good luck at picture taking but she didnt need to know that.
i got the gig..