The folks at Regimens really love skivvies. First it was a free-undies promotion, which we told you about a couple of weeks ago. Now they’re throwing an Underwear Party. And you’re invited! On Saturday, August 30, from 6 pm to 10 pm, enjoy “cold martinis and hot models” as you browse and shop the West Village store. Kind of reminds me of a night I once spent here. Except that was more like sweaty Bud Lights and even sweatier men.