Crochet in public

Yesterday, my friend/student and I crocheted in the library for about two hours. I am teaching her Tunisian, currently. She has learned the Tunisian Simple Stitch (aka Basic Afghan Stitch), Tunisian knit and Tunisian Purl. She has a swatch that's about 7 x 5 inches now. She will continue to practice until it's 9 x 7, and the rectangle will probably de donated to Warm Up America. She crochets very tightly, but very precise, her swatch, in orchid, is beautiful.