going to shinsaibashi,osaka alone

I was thinking of going to a bar in shinsaibashi alone (yes at night) so would this be a good idea?
Also, I was hoping to see a local band live too by myself, would anyone care that I'm by myself?
By the way, does anyone happen to know when the first train (subway) is in the morning and when the last train is?

The subway starts operating around 5:00 and stops operating around 0:30.

Thanks! is it the same times for the Hankyu line too?

Hankyu's last train departs at 0:25 a.m. from Umeda. But, the last trains don't reach to the terminals. For example, the last train of Kobe line is bound for Nishinomiya-Kitaguchi, doesn't go to Sannomiya. Kyoto line, it's bound for Shojaku. Takarazuka line, it's bound for Hibarigaoka-Hanayashiki.