You know what they say: 'variety is the spice of life'. [=life is more interesting and enjoyable when you do different things]
The talks covered a wide/great 'variety of' topics. [=the talks covered many different topics]
I was surprised by the 'variety' of the choices that were available.
(..) so I'm not going to try. Claims have been made that you have, uh, engaged in fraternization of the same sex variety. Specifically that you were... "seen in public venues with another female officer at a time and manner... as to suggest conduct (..)1997 G.I. Jane