I think even this is only true in specific pick-up bars, with music and suchlike, disco balls and colored lights and DJs, during the night. Pretty sure nobody tries to hit on an attractive woman in a hotel bar at 16:00 at least I never tried to, as it would be a breach of social etiquette, since these are not hunting grounds and these are not hunting times, if she wants to pair off she will got to a music bar at 22:00 and everybody respects that. Or at the very least, it can happen in fashionable bars in gentrified areas, but the average common (European) bar with retired working class types nursing their alcoholism, attractive women won't even go there, usually. Disclaimer: my experience is limited to Europe, and I think the whole phenomenon that median ages go well into the forties and not to put a too fine point on it but for white non-immigrant folks easily into the fifties colors the picture a lot. It seems almost like people young enough to be attractive basically make their own special subcultures and average typical places are old people places.