It's Cultural Friday over on SW Eighth Street, except there isn't really any culture. For that you need to go north a couple blocks and find this eclectic building. Upstairs: lab6 art gallery, showing new and alternative works, usually by locals. Downstairs: PS 742 performance space, featuring new and alternative productions from here and afar. On the sidewalk outside: alternative types looking for camaraderie or a place to drum or strum for the evening. Both upstairs and downstairs accommodate such desires, usually after 10:00 p.m. Next door: artist Carlos Alves's quirky studio and Adalberto Delgado's 6g music studio. The all-white, 3000-square-foot space at lab6 is new. Owners Carlos Suarez de Jesus and Vivian Marthell moved up in October after closing their appropriately titled show "Intimate Addictions: Living Large in Tight Spaces." PS 742 moved into the old space, which director Susan Caraballo transformed into a black-box theater and began presenting Surreal Saturdays and other nights of dance, song, and show. A highlight of the year: Upstairs and down joined together in celebrating Babalu Aye, or San Lazaro, the patron saint of healing, which brought together all alternative forms of Miami for a nightlong bash.