@rhiaro I think food should be no problem, even if there is none in the congress itself. Where the Globus supermarket is, there are several other shops, including a bio / organic food one and a drugstore which also has food:

https://www.google.de/maps/search/leipzig,+messegel%C3%A4nde,+supermarkt/@51.4014236,12.39618,16.79z