Hot Corner Hip Hop moves from The World Famous to the larger Caledonia space for its fourth installment, reflecting the series’ word-of-mouth success so far. This week’s lineup is the most impressive yet, featuring Atlanta psych-rap crew The Difference Machine and Savannah standout Dope Knife, as well as the local Space Dungeon collective, represented by Lingua Franca, Louie Larceny and WesdaRuler this time around. As always, the official performances will be followed by an open-mic freestyle competition, which “emphasize[s] pure creative skill over take-downs aimed at fellow freestylers,” say event organizers. If you haven’t witnessed this talent-filled town-gown crossover yet, make it a point to do so Thursday.