How do people find these chambers of commerce and tourist information centers without maps in the first place?

Some of them are easy to just run across (especially, if you are riding on major roads or highways).

The chamber of commerce in my town is not in a place anyone would be riding a bicycle.

I can see people stopping at these places if it's convenient but it's not always convenient.

It makes more sense to have maps ahead of needing these places to get them.

With a smartphone, it's easy and cheap to do that.