Coming to Nantes:
- By plane: the airport (Nantes-Atlantique - NTE) is located south west from the city center. To go to Nantes, take public transport (TAN). There is an airport shuttle mainly every 20mn and it takes 25mn to reach the city center (Commerce station) see details here. Tip: take line 48 (bus stop next to the shuttle one) and then tramway line 3. It is a bit longer (35mn) but costs much less ^_^ (a regular ticket). Tickets can be bought at the bus stop.
- By train: the train station is located in the city center. By fast train (TGV), it takes about 2h15 from Paris-Montparnasse and 3h10 from Paris Charles de Gaulle airport (CDG).
Be careful: sometimes the "plane" ticket between CDG and Nantes is in fact a train ticket. You have to pick it up at the TGV-AIR counter in the train station located between halls 2D and 2F. So, check your schedule! If the "flight" takes more than 1h30 from CDG to NTE then you will travel by train. In that case, pick up first your luggage at the airport.
The workshop will held at LS2N and the lunches will be taken at the University Restaurant La Lombarderie; see plan below. To reach the Campus from the city center, take the tramway line 2 towards Orvault Grand Val and get off at station Michelet - Fac des Sciences (10mn from Commerce station).