FASHION: Head over to Shotwell's for Party Nails' Pop Up Nail Salon, featuring sweet deals on nail art, along with happy hour beers. SFist's nails could certainly use some sprucing up. (5:30 to 9 p.m., Shotwell's Bar, 3349 20th Street)

SPORTS: D. Miles, the Godfather of Skate in San Francisco, the roller skaters from Golden Gate Park, and the Black Rock Roller Disco will teach you skate dances and moves such as the “Cupid Shuffle”, the “Cha Cha Slide”, the “Electric Slide” and more at the weekly Tuesday Night Skate, featuring a mix of funk, disco and R&B, and free margaritas and beer. (8 to 10 p.m., Cell Space, 2050 Bryant Street)

TALK: At this month's EcoTuesday, CEO of OriginOil, Riggs Eckelberry Riggs will discuss algae’s viability as a replacement for petroleum, industry trends, and worldwide technology advancing algae. (6:30 p.m., Energy Efficiency Funding Group, 657 Mission Street)