That makes you not enough of a geek
A proper geek would never commit the error of pronouncing 'zero' as 'oh'. Even for the sake of a pun.

Edit: @ Lampito, the whole joke goes (I can't claim credit for this, had it emailed to me, and I can only ever remember less than half of it when I try and tell it):

One evening, a C, an Eb, and a G go into a bar. Bartender says: "Sorry,
but we don't serve minors."

So E flat leaves, and C and G have an open fifth between them. After a
few drinks, the fifth is diminished and G is out flat.

F comes in, tries to augment the situation but isn't sharp enough.

D comes in and heads straight for the bathroom saying, " Excuse me, I'll
just be a second."

Then A comes into the bar but the bartender isn't convinced that this
relative of C isn't a minor.

He notices a B flat hiding at the end of the bar and exclaims, "Get out,
you're the 7th minor I've found here tonight."

The Eb, not easily deflated, comes back the next night in a 3 piece suit
with nicely shined shoes. The bartender (who used to have a nice
corporate job until his company downsized) says, "You're looking sharp
tonight, come on in. This could be a major development."

Which proves to be the case, as the Eb takes off the suit and everything
else, and stands there au natural.

Eventually, the C sobers up, & realizes in horror that he's under a
rest. The C is brought to trial, found guilty of contributing to the
diminution of a minor, and sentenced to 10 years of da capo without coda
at an upscale correctional facility.

On appeal, however, C is found innocent of any wrongdoing, even
accidental, and that all accusations to the contrary are bassless.

The bartender decides, however, that since he's had only tenor so
patrons, with the soprano out in the bathroom, and everything has become
alto much treble, he needs a rest, and closes the bar.
(username1, Wed 6 May 2009, 17:30, Reply)