Joseph Steinhardt and Zach Gajewski were attending a Boston college when they founded Don Giovanni Records in 2004. The idea was to put out hardcore music they liked, with a specialization, according to Steinhardt, in “releasing music from New Brunswick, N.J., and the surrounding area (including Brooklyn and New York City), and attempting to level the playing field between those bands and bands on larger labels.” But these guys don’t just put out music—they also bring it to you. And this weekend, they’re bringing you plenty over two nights at Music Hall of Williamsburg. Tomorrow night’s showcase includes Laura Stevenson (above, playing “Journey to the Center of the Earth” for Ear Candy) plus Shellshag, Upset, Nude Beach and Worriers. And not to be outdone, Saturday night’s bill features Screaming Females (below, performing “It All Means Nothing” for Sound Opinions) alongside California X, Brick Mower, Priests and Black Wine.