I have requested things in both Blu and Luminae that weren't specifically on the menu but that were obviously in the kitchen.
For example, I have asked for a real side of broccoli instead of just one or two florets. I have requested other greens as a portion and not a garnish. I love my green veggies!!
Also, on many lunches at Luminae I just asked for an entire plate of salad greens with vinagrette, and a grilled chicken or salmon piece on top. Never have they blinked an eye when I politely asked.
In Blu there was a risotto that we liked, but we just wanted a little taste, so asked for a HALF portion and then we divided that. I also remember that we have ordered a few appetizers as our entree.
I have also, like the cruiser above, asked for a bowl of mixed berries. As a matter of fact, it's my go-to breakfast on nearly every cruise: small bowl of berries, small bowl of vanilla or fruit yogurt, handful of granola and I mix it myself.
I hate to waste food, so on items that I know are over-served I ask for half: chicken and waffles that was in Luminae (may still be) I ask for one and one. I *have* gotten a look like 'are you sure?' Yeah, just one please. No bun on a burger, just meat on the plate. I can't say how many burgers I've eaten at Mast Grill (too many!) and I have never had a bun.
I do all this ------- and then I can enjoy a chocolate martini guilt-free. Well almost. Two? Then totally guilt-free lol.
You can spend your on board credit on restaurants, bars, internet, the stores, spa, excursions (but best to do independent in my opinion), and probably more that I'm leaving out. If it's refundable and you don't use it, it will go back on your cc. We've never sailed Princess so I can't answer your other question. Have a great time! Just be sure to spend all your non-refundable credit. Even if you have to go on the last evening and buy a black Michael Kors bag with a gold chain so you don't lose the OBC.
