Hard-working stylist Tina Chai will have an extra, non-fashion week reason to party when she celebrates her birthday tonight on the Lower East Side. Chai’s backstage handiwork was seen at the likes of Thakoon, Lela Rose, Peter Som and Rachel Roy and, if that weren’t enough, she also already has braved shows including Marc Jacobs, Rodarte, Proenza Schouler, Richard Chai, Michael Kors and Oscar de la Renta for further research. Of course, she had her survival staples in hand: water, Flintstones vitamins, Ictyane hand cream, lemon-mint-flavored Ricola drops and a healthy late-night fix of flicks from Turner Classic Movies. Setting aside her hefty Hermès agenda this evening, she’ll be swilling with friends at the low-key Slipper Room to mark her birthday. Whether Chai will don a favorite Marc by Marc Jacobs jumpsuit or Peter Som or Thakoon piece for the occasion (and whether famed client and Columbia grad pal Amanda Peet will stop by) remains to be seen.