Even though I live in the same city, I haven't visited the venue yet, but I hope to do it soon.

If no tuned grand piano can be found there, I shall volunteer to compensate for this partially by bringing to the venue my Roland FP-2 digital piano. It won't be as, um, grand as a real piano, but it produces reasonably listenable sound. (If there's demand, I can also bring some other instruments and maybe some simple amplification.)

I love music.

Thanks, @Amire80, for the kind offer! - Roland FP-2 sounds like a good alternative. A session would be wonderful too, if there are any other developer_musicians. What about you :)? Maybe we could do one or two pieces together ... - I never had a close relationship with scores, but I love improvisation, and I can figure out pieces by ear.

I can almost envision the recording:

Parsoid & Flow -- The RTL Jerusalem Sessions

Don't think there's a piano in the venue (unfortunately). Good thing @Amire80 offers his piano ;)
There should be quite a few places with good acoustics over there, though...