Apes of Mega-City One
Experiments in the past vastly increased the intelligence of apes, with the intention of using them as advanced slave labour. However, while such science has been outlawed for many years, its legacy remains, in the form of sentient apes. Often corralled into the less desirable parts of the city, it is not unusual for apes to form their own criminal gangs.
An ape gang is an unusual sight in Mega-City One and judicious use of the different species will give you a lot of flexibility. Plus, there is nothing better than sticking it to the humans who forced you to lie in squalor.