Here are day one addresses, and what I recommend you do:

9:00 Come to Uni Mail for the morning workshops
12:00 Lunch in town, the team will be happy to provide restaurants recommendations
14:00 Afternoon workshops start, still at Uni Mail

17:00 End of workshops, move to the Salle Communale de Plainpalais (500m from Uni Mail) for a drink and networking
18:00 Start of the Venture Night
19:30 End of day cocktail and drinks