CRITICAL MASS DEKALB will host a “Halloween Critical Mass” at 5:30 p.m. in the King Memorial Commons. For more information, contact Renee Kopulos at [email protected].

S.I.S.T.E.R.S. will host “Elote Sales” from noon to 4 p.m. in Dusable Hall. For more information, contact Ashley at [email protected].