The Slug Club is an informal name for Horace Slughorn's favourite and sometimes famous students at Hogwarts School of Witchcraft and Wizardry. Slughorn taught Potions at Hogwarts during two different stints; both times, he singled out students he thought had potential, either because they had influential relatives, such as Neville Longbottom and Cormac McLaggen or they themselves possessed fame or talent of some kind, such as Harry Potter and Ginny Weasley, or even both.