In France tisane is commonly ordered after dinner. I've never understood why people order coffee or tea after dinner. Don't you want to sleep?
This thread prompted to me look up the Wiki for tisane and then I thought I should look up the French Wiki too. They are a fair bit different!
http://en.wikipedia.org/wiki/Herbal_tea
http://fr.wikipedia.org/wiki/Tisane
Normally I order Verveine after dinner.