The workshop will take place at the
RETIS Lab, Scuola Superiore St’Anna in Pisa, Italy. The section "How to reach us by bus" is quite obsolete. You better take a look at
Lam Rossa to see the bus line leaving from the airport, and
Lam Verde or
Linea 11 (or E) to see how to reach our lab. I suggest you to buy a 4 rides ticket which is 3.50 Euros.
Hotels
At the following link
Accomodation in Pisa
you can find all the information about accomodation in Pisa. Specifically you can find info regarding:

Alberghi (Hotels)

Affittacamere (People who rents rooms)

Aziende agrituristiche (countryside rent-a-room, in the neighborhood of Pisa)

Bed & Breakfast

Residence (if you like to have a kitchen)

Residenze d’epoca (kind of B&B in old buildings)
Among the hotels, below you can find some info regarding their location. The price in brackets is about a double room for the night of May 6 (it is not a special university rate, I just gave a call to them). If you mention that you are invited by the University you may get a discount.
In the city center, in increasing order of distance to the night life:

Royal Victoria Hotel (80 (standard) 112 (best, view of the Arno river))

Leonardo (90)

Di Stefano (110)

Hotel Relais dell’Orologio (180)

Novecento (120)

Verdi (125)

Amalfitana (88)

Capitol (85)

Bologna (139)
Close to the lab:

Hotel Repubblica Marinara