Your local 7-11 if you ask me. Not a good cup to be found in any parks. I did have a good cup at Wolfgang Puck Cafe (downstairs) and KONA was ok. I too go for the inroom pot and brew from home. Have fun!
You at least buy some good bottled water if your going to do that, right? Not that Sparklets or Arrowhead junk, either. And then I would hope you bring a burr grinder with you. You make sure you pick up some beans that were just roasted right before you leave, correct? And then don't forget to bring your own Bunn coffee maker from home to replace the in-room coffee maker. Oh wait, never mind....
If you enjoy the Nescafe then drink away!
I'll take my ground DD made with tap water in the $10 coffee pot any day over that!
Here's my take on avoiding Nescafe and that industry-standard in room packaged stuff.
Kona Cafe and Polynesian Coffee Bar - both serve a Kona Blend and Kona Cafe has 100% Kona in press pots.
Artist Point has a signature blend served in press pots as well.
Jiko has Kenya AA in press pots.
Ghirardelli at DD serves Illy
Virgin Megastore serves Seattle's Best (Starbucks)
Bongo's take-out window has nice Cuban Coffee
Flying Fish Cafe has their own blend as wel, just brewed though, no presses.
I'm sure there's more, but those are my hot spots when I'm around and need a cup of joe.