blending in

A couple of my friends and I thought it would be fun to drop into an engineering lecture.
People weren't lying.
Engineer course lectures actually seriously look like this:

So being a group of girls it's not exactly easy to just blend in. Of course people are going to know you don't belong in that lecture. 

Contrary to my beliefs, this is not the best way to blend in. 

I believe those words were all very manish things to say .. .