Recommended Option for Lunch
The university is conveniently located in the center of Mannheim. A list of possible restaurants for lunch in walking distance is:
Mensa am Schloss (canteen of the university)
Safran (Afghan)
Kaschmir Tandoori (Indian)
Bodhi (Persian, falafel)
Nabati (Persian, falafel, vegetarian)
Pizza Ponte (Italian and Turkish)
Mr. Chang (Chinese)
Kombüse (vegetarian)
Bernstein (German, a bit more expensive)
Azteca (Mexican)
Soban (Korean)
Ha Noi Pho (Vietnamese)
Soup & Coffee (soups/stews)
Le Toulonnais (sandwiches)
Café Bistro Novus (international)
C-Five (very good but more expensive)
For the evenings you also might visit:
Zwei Hasen
Eismanufaktur ZeitgEISt (ice cream, very much recommended)
Rheinterrassen (quite expensive)
Ristorante Roma (a bit more expensive)
OPUS V (In case you want to enjoy a (very!) fancy conference dinner on your own :-))