Near the IMB (Talence)
The simplest possibility is to go the self-service Cafeteria of the Casino supermarket further down the Cours de la Libération (5 minutes walk, will easily accomodate a large number of people). Other possibilities are marked on the map (View Larger Map):
In Bordeaux
Ask one of the locals! Here are some good restaurants close to the town center (View Larger Map):