I think your sponsor is right to urge caution - many many people slip up in bars and clubs. 90 days is great but it's also still early days, right?.
I also think she's right that a few AA friendships wouldn't hurt. We can all use some resolutely sober friends who understand alcoholism and addiction.
But I also love live music. I also think there's a difference between drinking buddies and real friends. I presume your close friends know all the gory details about your alcoholism?
I think if we really want to be sober, we will be
D