In Ortigas? Ewwwww....it's kind of an upscale ghetto a bit like Makati, i.e. malled-up and sterile compared to the rest of the area (for better or worse). You can walk to SM Megamall, one of the 10 biggest malls in the world.

The usual tourist circuit is heavy on places in the city of Manila itself, like intramuros, Rizal Park, maybe Binondo, and sunsets on the Baywalk. There's also the original Aristocrat on Roxas Blvd. as a major home of Filipino food (it's large, relatively inexpensive and very popular).

There's also a circuit of sorts with Makati and all the Ayala places, especially Glorietta and the Greenbelts. More malls, reallly, but Greenbelt also doubles as a rare park-like green space and a nice setting for lots of restaurants there. I've become a fan of John and Yoko (east-west fusion in Greenbelt 5), but it's also possible to try Chili's, Bubba Gump Shrimp Company or other transplants. On weekends the Havana Cafe in Greenbelt 3 becomes a nexus for musical entertainment and swells to double-size.

The problem with Ortigas is that you can easily spend an hour in traffic, even on weekends, to get to Ermita and the old-school attractions. With Makati you *could* try the LRT, but those rail cars can get very crowded.