Originally Posted by
SHBR
There was a video of a member here that mounts his bicycle by standing it up vertically and wheeling it under his legs. That would be my workaround, if I already had a bike that fit me.
May be difficult with bags

But on that note, I've also seen one person mount their bike by lying it on the ground, stepping over it, and picking it up.
Originally Posted by
Squeezebox
I've never seen a mixte frame of any decent quality.
Both Bob Jackson and Mercian made mixtes back in the day. I've seen other mixtes and step through with 531 frames. May not be the most common, but they exist, I know Raleigh, Peugeot and Motobecane all had them.
EDIT: Here you go, just a few examples, now that I've gone down this rabbit hole of searching

:
http://www.bikeforums.net/classic-vi...mixte-etc.html