So DrChocolate has shared some awesome experiences as an Uber driver.

In a similar vein I suggest BlaBlaCar. It's a ride sharing app that connects drivers and passengers heading in the same direction. Some friends have been successful meeting women this way.

You can vet passengers by reviewing their profiles. They pay token amounts for gas, but the appeal is in meeting new people.

This is not an ad I swear, there are more carpooling apps like Poparide. In general I think vehicles offer the best exposure by far, so I figured I would pass along this idea.

Anyone have more suggestions?

It really depends on your goals.
There are a few individuals I know personally, including myself, who don't wear pheromones to get laid but, rather, to make daily interactions smoother.
So for me, work is the place I test things the most.

But personally, I think testing a product in all sorts of contexts would offer you a more expansive idea of what you're working with.

Anywhere really, I think the street is the ultimate test, you know like a wild environment where like Pheromones diffuse 360. If you like taxis, you can try buses also, bars are good,etc

Why test outside the environment you want to use it in?