I drive a '93 Corvette to the office (it looks brand new) and I occasionally get some minor @#$% from co-workers about "Oooooh....drives a 'Vette", etc.
Based on these experiences alone, I would probably NEVER drive a Cobra to the office, even under the best conditions and even if it was my only mode of transportation (assuming the daily driver was sick).
Do you keep your Cobra a secret from co-workers, or do you just let them find out via other ways?