Where is the weirdest/oddest place you've done an OPK test?

Stephanie • Mother of a sweet little boy (11/13/16) and little girl (08/30/2018)! 2 MCs (12/20/2015 and 7/25/2017)
Recently my schedule has been thrown off and I've done an OPK at a rest stop and in a restaurant bathroom. Has anyone else found themselves in a similar position?