There's so many things to do in Grenoble, but first I could teach you the practical stuff (transport, where to shop...). Then I would love to show you the main street art places, which are created every year during a street art festival !
And if you're into parties, I know some really alternative places or nice pubs with a lovely atmosphere ! Well I can also take you to "basic" places but in any case the atmosphere's going to be really warm and welcoming as the Grenoblois ! And the party activities are pretty cheap here.
For the athletic ones, we could go climbing outside or inside and then have a yoga streching moment in the park Paul Mistral !!