You can't have multiple categories in JEvents 2.0 BUT silver members can use the Jevents tagging addon which allows you to assign multiple, pre-defined tags to events. With these tags you can filter menu items and modules and also search for events. They therefore offer 90% of the functionality people want from multiple categirues.
JEvents Club members can get priority forum support at the Support Forum. As well as access to a variety of custom JEvents addons and benefits.
Join the JEvents club today!