Where to place apps for WINE to run?

[Josef Lowder]

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Any WINE (program, not drink) users/experts out there? 

I have just learned that some win-applications that I need to run reportedly
now work under WINE, so I downloaded/installed the latest version of WINE to
have a go at it.  But where on one's system (ideally) should one install
win-applications?  I have an empty /opt directory that some have suggested is
a good place to install applications.  Others have suggested 'var'. Others
have suggested in one's home directory. 

What wise counsel would you suggest?