"MetLab": Short for Metrology Lab. Metrology is the science of measurement. Measurement is all about decimal precision. The more numbers to the right of the decimal, the more accurately you can measure things.
*** Make sure you know how to plug decimal degrees into your GPSr, or how to convert decimal degrees into the traditional Degrees, Minutes format! ***
The best time to avoid muggles is over the weekend and in the evening! Avoid trying to find this over the lunch hour - lots of people around coming and going!
I work nearby and would love to show off my Quality Lab where lots of measurement is going on. If you are around and would like to get a tour of a real "MetLab", please send me a Message from my Geocaching Profile. If I am available, I will be more than happy to tour you around!