You can substitute fields into a Custom HTML field to display them in whatever layout you like. Example as follows.
[cb_zipcode] [cb_city]
You likely however will want any sort of formatting for the field to be applied so instead you'd use the following.
[cb:userfield field="cb_zipcode" /] [cb:userfield field="cb_city" /]
See the below substitution tutorial for further usage information.
www.joomlapolis.com/documentation/279-community-builder/tutorials/18353-using-substitutions-throughout-cb
You can also do similar with the Layout parameters of a field, which allows you to extend the display output of an existing field with more information. So for example if you edit cb_zipcode you can set the Userlist Value Layout to the following.
[value] [cb:userfield field="cb_city" /]
This would cause cb_zipcode to also display the city.