Fink@World will happen in the modern and specifically designed building of the Institut Pascal, Orsay France.
The exact address and location are:
Institut Pascal
Small Amphitheater
530 Rue André Rivière 91400 Orsay
If you are coming from Paris using public transportation, you should take the RER B in the direction of Saint-Remy les-Chevreuse, and get out at Orsay Ville.
Once at the station, take the bus 4607 in the direction Plateau de Moulon - Corbeville and get out of the bus at the stop De Broglie.
See detailed path here.
See detailed path here.
Note that, in principle, you can choose to walk from the train station to the institute, but the path follows a very steep hill. More information at the IPa dedicated webapage.
Accommodation
If you search for a convenient place to stay, consider the available public transportation.
Anywhere near the RER B stations Orsay Ville or Le Guichet are convenient, the latter requires a 10min walk until the bus stop Launay.
The other bus line that serves the De Broglie stop, thus leaving you 3 minutes from the veunue, is bus 4611. This line is an option in case you decide to stay near the RER B station Gif-Sur-Yvete. From this station to the venue, you will need around 30min bus ride.
There is also one hotel on campus, which requires ~15min walk to reach the venue. Note that this option may be more isolated than usual from amenities and city life.