I don't know if you've ever played rugby or touch rugby but a guy in Dresden orgnises touch rugby there. It is a very social game and attracts many English-speaking expats, so even if you have never played before it is a good way to make friends, beginners are always welcome.
Contact details on the website:
Touch Rugby Deutschland
TOUCH beim RV Dresden, Giles Sims, gilessims@dresdenrugby.de, 035 1849 5205 or 0172 448 3859