>>But "been frequenting" is past, right?
>
>No, "I have been frequenting" suggests that I'm still doing it, you see.
>"I frequented that club in my twenties" is in the past

This is the shift that I quite often don't get - "I have been frequenting" sounds like past to me.

>>OK, you found me :). Tull fan (albeit not of the rotating ventilating persuasion) for decades.
>
>Oh, I already knew that :-) BTW, "fan" is short for "fanatic", so not the sane word as the ventillating device.

I already knew that. My previous machine was a fan club. It had four fans (two in the power supply, one for the CPU and one more for another hot chip.