I got this idea through my Yahoo altered book/arts clubs. I noticed someone used coasters to alter and got them from restaurants. It occurred to me that I could do it with beer mats so I have asked my drunken mates to collect beer mats for me! (Sorry....they aren't really drunken!) I collected one myself recently (yes...just the one...) and have been playing with it today. As it happens I have a son called Matt so I could not resist altering the first mat in his honour. Matt himself is quite artistic but I he'll probably still think his mother is a teensy bit mad....see below!

I use my printer quite a bit to print things on paper for backgrounds and in this case I gathered a clip art image of a beer glass and made it tiny. Then I copied it all over the page enough to cover the beer mat with. I stick it on. I also printed an image of Matt and pasted it onto cardstock.
Feeling that there was too much black I found used some old music and tore it into small pieces, smearing it then with gold acrylic paint just a little. I used a finger! Stuck the pieces of music down and then put Matt on top. I am very pleased with the result and plan to give it to him for his music/computer/den room! I thought I might punch a hole in it and put some wire through to hang it from.