Before frosé was a glimmer in anyone’s eye; before fusion restaurants were as ubiquitous as fondue; heck, before Denver restaurant king Frank Bonanno was even born and when Union Station was cool the first time around, there were these restaurants. We can call them classic, we can call them old, we can call them restaurants of a certain age, but no matter the semantics, these are the spots that have stood the test of time.