Cynthia,

If your adventures move on to embrace face to face interactions then one to consider is going into the bank to change notes into coins. When I'm lucky enough to get my extended me time (a whole week enfemme out and about) at the start I always change a note into smaller denomination coins which I then keep in a small coin purse for use in car parks should the need arise.

The staff as you'd expect are polite and professional, much as Donnalee relates, often engaging in a little chit chat, and let's face it, unless you're unfortunate enough to be there when it's robbed like BarbDriscoll then it's about as safe a space as there is.