You have no worry!
If you want to really see where you need magnetic shielding go to a Chemical Plant that makes Chlorine. The make it from bine ( slat water, NaCl) and use sevral millions or dollars worth of eletricity each month. You have to take off anything remotely magentic, credit card stripes, watche, cell phones. It is several magnitudes stronger than what you are worrying about.
Is will affect the electron beam in a Cathode Ray Tube as previously mentioned, and personally I would not put my billfold or credits cards on top of it, but any newer TV it will not affect !
Peace and Magnetic Resonance,
Forest Man