Music or performance events tonight (4th April)

Hello Sofians, it is mine and my wife's last night in Bulgaria and we'll be back in Sofia where we started our holiday.

I wondered if anybody could recommend an event such as a gig/music performance/concert or something like that? Unfortunately we don't speak Bulgarian so wouldn't be able to understand a play for example.

We really like live music (rock/indie/punk/alternative mostly but wouldn't mind a DJ set or something either!)

We really like the look of Maimunarnika in Borisova Gradina, but when we were in Sofia two weeks ago it was closed I think? Is it open yet?

Thanks very much for any recommendations. We have loved our holiday here and will definitely be back.