[Grisgra]

Excellent question. I used to call there all the time, even though now when there's a raise/coldcall or limp/raise, I don't call in the BB with 76o when it's going to be 3-handed. (I probably will if it's HU, as a pair might well be enough, or if it's 4+ handed, as I have enough implied odds to try to hit two-pair, trips, or a straight, I think, but 3-handed, generally not).

So that said, while I don't call in the BB with 76o when it's 3-handed, I ALWAYS used to call the BB raise after completing with 76o in the SB.

This made no sense to me, and so I recently stopped doing it. After all, often (but not always, certainly at 10/20) the raise from the BB means a pocket pair, so that if the flop comes 7-high you're more likely to be screwed than if the preflop betting pattern had been different.