Even though it’s not yet fully operational, co-owner Klaus Ortlieb saw no reason not to throw himself a low-lit/high-style birthday bash tonight — and it’s still going strong.

Among the endless downtown types in effect at Ortleib’s $245 million Cooper Square Hotel (above) was teeny/tiny vegan musician Moby — in the house with a pretty blonde — and an array of designers, architects and PYTs. While Moby did not stick around for long, he certainly made his mark. “Send those sandwiches over there,” Transracial overheard one reveler demand, pointing in Moby’s direction. “That’s where all of the yoga/vegetarians are hanging.” The meat-free treats arrived promptly.

A party for rock band Buckcherry was supposedly also taking place at the Cooper Square, though the only cherries we saw were at the open bar.