This is in the USyd forum and we dont have a boost or michel's on campus
The mexican place bottom level of manning does decent smoothies/frappes. Not such great milkshakes though.
Avoid Mint Cafe and the health food place in wentworth for smoothies though, they're pretty terrible (but I like smoothies/frappes made with ice rather than lame milky ones).
Not really a huge fan of the hot chocolate anywhere on campus but San Churro's up in Glebe is only a 10min walk from the quad and their hot chocolate is thick and creamy and delicious