* A normal lunch at CERN costs about 15 CHF, inclusive of one coffee and one delicious dessert.
* You can pay with CHF and EUR in CERN (the drawback is always CHF) and most of stores and restaurants in Geneva
* The AC power plugs you'll find at
CeRN are SEV_1011 (https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets#Swiss_SEV_1011). You can borrow one at the hostel reception.
* As guest you can only enter and exit the main CERN area through entrance B
(SEV 1011) https://de.wikipedia.org/wiki/L%C3%A4nder%C3%BCbersicht_Steckertypen,_Netzspannungen_und_-frequenzen#/media/File:J_plug_-_1.jpg