"Hey guys, let's stick together, if we get separated meet at the bar. Cool? cool"
And an interesting one you can't easily do anymore without a cell phone (because people don't wear wrist watches):
"Hey, i'm going to checkout X. Meet at the bar in 30 minutes?"
Of course we got by OK before mobile phones, but to suggest we give up the considerable benefits because an artist or venue opts for a heavy handed ban over a strictly enforced etiquette policy seems unreasonable.
Perhaps you have never had the experience of taking a close friend or relative with a disability, social dysfunction, etc. to their first ever concert and knowing it's partly enabled by the fact that if you somehow become separated you are both carrying electronic devices that will let you reconnect easily. (I find many people evaluate situations based on a default expectation that everyone involved is able-bodied, of sound mind, and socially adept, and then get defensive about "hypothetical" situations that are realistic considerations for a lot of us.)
- Save docs of maps for later. - Save docs of the names of place you want to go (translated into the local language and in your own language) - Similar for a few key locations (ok - mostly the hotel).
Makes a big difference when you can't read the local language... but yeah, being connected, not needed - and I could have done all that with bits of paper.