At the Leiden University Postdoc Assembly (LUPA) you get to know other postdocs and you can exchange experiences. The platform is also a channel for obtaining information and promoting the interests of postdocs within the university.

For more info check: https://www.staff.universiteitleiden.nl/research/postdocs/representation?cf=science&cd=leiden-institute-of-physics-lion 

and read more here: https://www.staff.universiteitleiden.nl/binaries/content/assets/ul2staff/onderzoek/postdocs/lupa_goals-and-aims-2.pdf