PARK SLOPE AND WILLIAMSBURG Two parties will get your blizzard-weary body moving tonight. At Union Hall, DJ Jinners and Panda Porn McAwesome will play a mix of old and new hip-hop and poppy indie rock at their free dance party, Snow Jams, beginning at 11pm, with $5 drink specials. And at Glasslands, Soul Man Jonathan Toubin returns with his epic Soul Clap and Dance-Off, where you can boogie down to rare soul 45s and win real prizes for your dancefloor skills (like $100 in cash). The party starts at midnight, the dance-off is at 1am, $5.