Geek Humor!
A virus walks into a bar, and the bartender says we don't serve viruses in this bar. The virus replaces the bartender, and says now we do.
An infectious disease walks into a bar, and the bartender says we don't serve infectious diseases in this bar. The infectious disease replies, well, you're not a very good host.
Two bacteria walk into a bar, and the bartender says we don't serve bacteria in this bar. The bacteria replies but we work here! We're staph!
... getting geekier...
A room temperature superconductor walks into a bar. The bartender replies we don't serve any superconductors in this bar. The room temperature super conductor leaves without putting up any resistance.
... and geekier...
An infrared photon walks into a bar and asks, is it hot in here, or is it just me?
... deeper down the geek hole...
A neutrino walks into a bar, and the bartender says we don't serve neutrinos in this bar, and the neutrino replies, hey, I was just passing through...
... one last level of geek factor...
Schroedinger's cat walks into a bar... and doesn't!
And a bonus geek joke!
√-1 2^3 ∑ π