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To everyone looking for tighter spacing and to whom Hidden Bar or similar apps are otherwise enough, I suggest trying these terminal commands:

Code:
defaults -currentHost write -globalDomain NSStatusItemSpacing -int X
defaults -currentHost write -globalDomain NSStatusItemSelectionPadding -int Y

Punch in the value (say 8) instead of X and Y, press Enter and log out for changes to take effect. Revert with:

Code:
defaults -currentHost write -globalDomain NSStatusItemSpacing
defaults -currentHost write -globalDomain NSStatusItemSelectionPadding

And that’s it - enjoy!
 
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