Young people in full-time education and living in ethnically diverse places are particularly likely to experience multiculture as part of their everyday, routine lives. They attend schools and colleges where their activities are co-produced with students with different ethnic backgrounds to their own. This chapter explores the fine line that young people's banter navigates as they generate in-groups and bonding or social harm. It focuses the experiences of young people in urban educational institutions, referred to as colleges in what follows (a school sixth form, a sixth form college and a further education college), populated by a mixture of ethnically, class and gender diverse young people. There are three overlapping aspects to the institutional practices of college: the first relates to student educational success, the second to the explicit celebration of cultural diversity and the third to college spaces designed to support student interactions.