i go to karaoke bars all the time, great way to meet people. some are also karaoke regulars; some of them don't sing but we bond over shared taste in music. it's 180
nowadays usually i go with people or just see people i know at the places i frequent, but there were a few years where i went alone a LOT. i remember i was always kind of awkwardly on my phone until i sang and then people would always approach me after; it helps to have a niche or shtick to be reliably approached. but you can also strike up convo with other people about their performances or song choices. but yeah it is more daunting when it's only groups.