This was (is?) a service also provided by some loyalty cards that have small versions that attach to the keyring, most notably some grocery store cards. Checkin

This was (is?) a service also provided by some loyalty cards that have small versions that attach to the keyring, most notably some grocery store cards. Checking what's on my keyring right now, Mariano's (WI/IL chain, now owned by Kroger) appears to have this. Albertson's at least had this policy in 2004, with some details from an employee: http://www.goodexperience.com/tib/archives/2004/06/albertsons_supe_1.html http://www.goodexperience.com/tib/archives/2004/06/albertson...