On June 16th Pisa holds the Luminara festival, held for the patron saint's day (San Ranieri). At sunset, all the lights along the Arno are dimmed and more than 10000 candles are lit, which makes for some spectacular sights from the Ponte di Mezzo. Various activities are organized in the streets and the night ends with a big fireworks.

Another summer attraction is the Gioco del Ponte (Game of Bridge), a historical manifestation held yearly on the last Sunday of June, in which the two sides of the city (Tramontana and Mezzogiorno, geographically split by the Arno river) participate in a historical procession, with 709 walk-ons, then challenge each other to a physical match in which their teams, each composed of 20 members, try to conquer the "Ponte di Mezzo" (the main bridge in Pisa) by pushing a trolley in order to force the rival team off the bridge.

For nightlife, there aren't many clubs or live music places in Pisa: the usual night in Pisa is having a dinner of pizza or a cheap kebab, having a beer in Borgo Stretto, or Piazza delle Vettovaglie or a pub in the surrounding areas, and having a walk in Piazza Garibaldi and Lungarni, where the "spallette" (the low brick walls around the river) are full of students.

Some alternative clubs (hard rock, alternative, funky) in the center are:

Ex-Wide
Borderline
Less alternative clubs are found at the seaside, about 8 km from Pisa, in Marina di Pisa and Tirrenia. For instance

Pappafico (a disco with house music and the like)
PIA (a disco/bar on the sea)
Sunset (mainly a aperitiv/happy hour/chill-out location on the sea)
Take a photo of yourself holding, leaning against, or "anthropologically appropriating" the leaning tower of Pisa.

SPAS

Casciana Terme : the thermal water used at Casciana Terme since ancient times, has in recent years seen its applications extended to modern rehabilitation therapies, cardiovascular and respiratory treatment, in the improvement of the digestive functions and their treatment, because its natural, relaxing action enables patients to regain their functional equilibrium and the enjoyment of pleasures they had lost.
 
San Giuliano Terme : Water with beneficial effects and calciferous magnesic sulfate water, naturally rich in vital curative elements, gush forth at the foot of Mount San Giuliano at the Spa out of different springs and are gathered in two groups called the "East Baths" (40° C temperature) and the "West Baths" (38° C temperature).