Try Cryotherapy
It turns out you can LITERALLY freeze your ass off. Speaking from experience, a full-body cryotherapy sesh is a wild ride. You step (naked) into a Star Wars-esque chamber and shiver for three minutes while the temperature drops below 230 degrees Fahrenheit. It feels like you're skinny dipping in Alaska.
What's the point? The cold (via liquid nitrogen) increases blood flow, reduces inflammation, AND burns up to 800 calories. Not to mention increases your metabolic rate throughout the rest of the day. While it can get pricey (one session at NYC's Cryofuel will run you $75), it's cheaper than lipo.
[Photo via @cryofuel]