I have a 2004 Nishiki road bike and a 1985 Panasonic fixed gear conversion that I use to get around town. People in the road cycling forum have crazy ideas as to what is proper. So I have to wear my cycling shorts every day to go on my 1 mile ride to or from school??? What??? No jeans?
The SS/FG people seem to ride everywhere out of utility, not recreation, so they tend to be more realistic about things.
For me though I ride my bikes interchangibly, one has multiple speeds and the other doesn't, it's more about why I ride them that defines what kind of cyclist I am.