As a music writer, I go to gigs constantly, and I am almost always on my own - the present Mrs Hughes likes almost none of the music i enjoy professionally or socialy.
As a guy it is easier, but consider this - I wrote for five years as the UK Correspondent for Metal Maniacs, a New York extreme metal title, they thought bands like Metallica were lighweights!
That meant me going to gigs played by obscure Scaninavian metalheads, and when you consider that I look like a Loyd Grossman / Paul McKenna hybrid, andf I'm fifty-seven, you can imagine how much I stuck out!
But the great thing about gigs is, no-one cares who you are, what you look like, or indeed who you are with, you can often get into conversation with people near you, and have a nice evening with some company, or not if you prefer to be left on your own.
I'd get along to any artist you enjoy - no-one is going to accuse you of being a saddo because you are alone, no-one will notice, or care, neither should you.