Do Jamroom sites use cookies?
Using Jamroom
yes jamroom uses cookies.
Cookies are used to store information about the state of things, like if you upload an image via the Embeded Media Module and you choose to have "Large" as the size, then that will be stored in a cookie so next time you upload an image "Large" will be selected for you.
There is no module like cookieconcent. If you want to replicate what that module does write this in the footer.tpl of your site next to the copyright notice
"This site uses cookies, by using this site you agree to have allow us to store information required to make the website work."
Not sure what the EU was thinking (not thinking) when they made that law.