Seconding what TiffanyR said, with one caveat about dating apps for casual encounters.
Where that one stands or falls is whether the recommendations improve with use.
Out of roughly 120 matches on dating apps for casual encounters, 4 turned into an actual conversation.
Assuming you are not paying, whether the search actually respects what you set is where it gets tight.
What separates dating apps for casual encounters from the rest of the field is how quickly you can narrow a list down.