Utility bikes have long had a rather low angle seat tube.
black Dutch Opa, are pretty well sorted out by now, being unchanged since before WW1

[crank forward have taken it even further back]

the riding posture is upright , a rate of speed will be stately.

so dress in your best clothes since the ride is about looking good ,
and arriving in the kind of clothes that put you in the GQ dress for success mode ..

Just be aware the fine wool fabrics will wear thin where your saddle on the bike contacts,

So a Polyester blend is probably better ..


its all about numbers , to learn more, bring an angle finder and a tape measure , and gather Data.