About the three photos in the back of the business card thing - I've learned a lot from my graphic designer wife (hence the comment about the 14 fonts and "coolz" tag line comments, lol). The three photo thing can work for you or against you.
Not sure what you had in your DJ card, but remember it's a tiny piece of cardstock you're handing out. Put three photos on there and you're putting 1" images down - will you be able to see them at all? Will it do any justice to your work?
Instead do what Brit suggested - walk in with your portfolio in hand and show her the real deal.
Just don't act eager or needy - and definitely no whipped cream and no drooling!