If you really don’t have anyone to join you, then by all means get out there. After all, I can only speak from our experience, and we were always together.
However, if you’re a woman, I really really must insist you bring a man along. Even if you’re some sort of master of self defense, it won’t deter psychos like having a man with you. Your chances of being picked up by some crazy person are greatly reduced not only for that reason but also because you’ll outnumber them.
The complete opposite is true for a man. Take your girl along. All those nice people who would have normally passed you up before will now be much more inclined to pick you up since there’s a woman with you.
Even if the above is completely false, having some company with you will do wonders. It won’t always be rainbows and sunshine, but it will bring you closer together than you could imagine.