Near my town there's a nice pub which is the only place in a big radius which offers live rock, metal and acoustic music (other venues offers DJs which puts reggaeton, hip hop, trap and EDM) and a good choice of games (pool, mini bowling and pinball).

I visited the place many times and I love it but there's a problem: my established friends prefer other venues and different music so when we hang out we never get there and I don't have other choices but going alone. The problem is that I don't like to spend 2 hours completely alone to sip drinks and I would like to catch the occasion to meet new people and broaden my circles but I don't have any idea on how to find the right people, approach strangers and start conversations with someone which I don't know.

So the question is, how I can socialize when I go alone to a pub/live music venue?