Hi,
In the conference venue page, there are options for hotels near the conference or near the city center ( and still not too far from the conference in public transportation, IMO the best choice to benefit also visit by night. And eat outside great stuff with others )��
If you come by train to Lyon. You should arrive near the city center.��
If you arrive at the airport of Lyon ( st Exup��ry), you then have to take the ���Rh��nexpress��� from the airport to the ���Lyon Part-Dieu rail station��� - 30min.
If one part of the transportation is not clear. Don't hesitate to ask and I'll try to help :-) (I work at Lyon)
Beno��t��