Pushing is my default in winter. I shoot in my dining room at f/4 1/60s @1250. I can't use a tripod, I like f/4, and I like hp5+. So I push. And I've had fun comparing the effects of HC110, ID-11, DDX, and Microphen.
Why 1/60? 1/15 would gain you two more stops, and still (barely) be hand-holdable.