They were in a a separate exhibit near the 'boardwalk' decking section with the large interpretation panels. The free-ranging species were Red Ruffed, Black-and-White Ruffed, Ring-tailed and Red-bellied, with the mix of Crowned Sifaka and Alaotran Gentle completing the lemur line-up.
Unfortunately I don't have any of the interior, but it was quite a steeply-sloping grassy-type affair with logs as the main furnishings. Perfectly pleasant but not especially remarkable!