If you are going to do quizzes on a regular basis it'd be worth investing in a few books or an e.book or 2- then add some current affairs questions for that week. We had a thread on this a year or so back and the general advice was don't make the questions too hard (well not all of them) or people will lose interest fast.
For a picture round use google images and compile a library of famous people (you'll need 10). The quiz I did last Mon included a picture of me

and more people answered that correctly than identified the current Secretary of State
As Kingy says compiling a quiz can be fun just don't make it too hard
Paul