I have a (seldom) used address with friends in NYC:
Mr. Rudi Martel
at Firstname, Name
address
which I use (rarely) for special purposes as:[*]AAA membership (AAA didn't accept me with a European address)[*]tickets (US Tennis Open, Broadway perfomances, Lincoln Center, Metropolitan Opera)
I did allow my friends to open all my mail (and throw away propaganda material). Whenever I visit them, I leave some prestamped envellopes with them - but most things (tickets, membership-cards, etc.) I just pick up when I (or Gisela) is visiting them (2-3 times / year).