Queenie: There are a few options for the ladies of the night from the Judge's Guild book, although you can make your own. There is also a thieve's guild, but I believe they don't take kindly to women inside the guild or unguilded thieves, which could set an interesting dilemma for your character. There are exotic dancers who put on belly dancing and other such shows (some dancers being ladies of the night) at the Balor's Eye tavern, which is a popular place for adventurers. The Pleasure Dome is an invitation-only brothel, but usually the women are all slaves and the clients are a cess pool of corrupt political officials and aristocratic dandies. It is run by one the City-States crime lords. The Happy Harpy is run by a woman who runs a mixed roster of specialist free women and slaves. The Naughty Nannies run an establishment of specialists and no slaves and is also run by a woman. Both these latter establishments cater toward a more sophisticated crowd, though travelling mercenaries prefer the Naughty Nannies.
Dartis: There is the Sage's guild, though they seek to stay neutral of politics and conduct research in order to stem the depletion of knowledge during these dark times. Many members would have talents with magic. They sell their knowledge for high prices. Your character could have been a noble who learned his tricks at the Overlord's School of Ancient Knowledge. Perhaps your family lost its noble title and you are now having to survive on your newly learned skills. There is also a mage at the local bazaar who sometimes teaches tricks in exchange for errands. Most street urchins never get past cantrips, and often can't retain that meager knowledge they do learn. Perhaps the teacher purposely teaches only enough... The Sorcerer's Supply Shop is a popular, but expensive destination whose owner frequently takes on apprentices to help with the growing demand. There are a smattering of other wizards in the city running such things as a fortune teller shop and so on if nothing above strikes your fancy.