It's true that some people might view you as a "loser" if you are alone. But most people are too involved in their own world to notice you.
Besides, f*ck what they think. Do what you want. You are not a loser because they think you are, you are when you think you are. As the wise men say "You are the Great Catch."
In addition, sometimes, you will meet some friendly souls who will say "You are out alone? Come join us!" Then you find yourself at a table full of strangers - but you "belong" there all of a sudden. Honestly, this has surprisingly happened to me on more than one occasion.
I like having a wingman, but sometimes he wants to leave when you want to stay, and vice versa.
Try it alone. It not like you have anything to lose.