All meetings will be held in the Hörsaalzentrum Physik/Mathematik/Chemie
Public transport in and around Mainz
The closest bus stops to the meeting location are Friedrich von Pfeiffer-Weg or Staudingerweg.
For a complete map see: MVG
Note that you can pay the bus driver in cash for a single ticket (2.80 Euros); they will provide change, but bills may pose a problem). There are also cheaper options: you will get 5 tickets for 11.40 Euros, for a day ticket 5.35 Euros or a group day ticket for 10.30 Euros valid for 5 people.
Busses 54, 55, 56, 58, 75, 650 and trams 51, 53, 59 leave Friedrich von Pfeiffer-Weg in the direction of the main train station (and vice versa) typically every 5-10 min during the week and every 20 min on Sundays. It will take about 7 min by foot to reach the bus stop; the trip to the train station will take about 6 min.
In principle you could also exit at one of the “University” bus stops. However, it will take you about 16 min to walk across the campus to the meeting location.
Sightseeing in Mainz
Even though 80% of the downtown was destroyed in multiple air raids by the Allies during World War II, there are many interesting spots to discover in Mainz. City walks are described here.
Among the museums, the Gutenberg Museum honoring the inventor of book printing and presenting his technical and artistic achievements, is certainly special. It will even be nicer, once the museum remodel is complete.
Among the churches, the 1000-year-old Mainz Cathedral and the painted glass windows by Chagall in St. Stephan are recommended. Locals are also very proud of the modern architecture of the new synagogue (credits Wikipedia).
The old town and the riverfront are always worth a visit. Note that the signs of streets parallel to the Rhine River are blue, while those perpendicular to the river are red.
If you happen to stay longer, you may want to explore more of the region. The wine country on the “wrong” side of the Rhine always used to be much richer than the Mainz side. The Rheingau is famous for its wines, such as those from Schloß Volrath, cute villages such as Eltville, and monasteries such as Kloster Eberbach (credits Wikipedia).
The Unesco World Heritage Middle Rhine Valley, with its many sites, can be reached by train or ship. It is possible to combine both types of travel. The most interesting stretch runs from Bingen to St. Goar.