I would like to do this effect.
Unfortunately the pug is no longer available or updated for today's versions of Adobe Illustrator.
Would you know of another way of doing it?
Hope you can help.
As you mentioned in the comments you have Photoshop, you can do it pretty quickly by following this process.
...and you are done!
if you want to increase the dark & light contrast, add a Levels Adjustment layer after step 2 and play with the black & white levels. The darker the image, the thicker the black lines will be. Sometimes you may want to go a lot darker than you would in a normal image, experiment with that and then apply the halftone effect and you should get what you are looking for.
Remember to merge the levels to the image before applying the halftone.