Files with wzk file extension can be found as some kind of very old, compressed spreadsheets from a program called Wingz.
WZK file extension - Wingz compressed spreadsheet
What is wzk file? How to open wzk files?
File type specification:
The wzk file extension was in the past used in the Wingz program for one of its default file types.
The .wzk file contains compressed spreadsheet. The program was sold in 80s and 90s, so largely obsolete much like its own file types.