Wow, I'm answering most of your questions
In the most part, the Chino Valley, IMO, is geared more toward families and reflect typical suburbia values with some urban flare.
There are a tons of things to do for kids/family or outdoorsy type people here and a few things for the 20 somethings. I may be wrong, and others may add to what 20 somethings with no kids are doing.
There are numerous parks, sports activities (golf, baseball, soccer, archery, horseback riding, shooting, paint balling, hiking, etc. etc.), and retail and entertainment centers.
- The Harkins Theater is a really nice new theater located on the North end of Chino Hills
- The new Shops at Chino Hills is a lifestyle mall - like a
very small Victoria Gardens/Old Town Pasadena/Downtown Brea.
- Strip mall shopping in the Chino Spectrum, Rancho del Chino, and upcoming Commons at Chino Hills.
I think Chino Hills enforces a curfew after 9/10pm for minors so the malls empty out in the later hours.
I'm not sure about clubs and such... since my wife and I don't do anything like that. But, if Chino Valley is too quiet for you, you can easily hop on the freeway and go a little bit out east toward Rancho Cucamonga/Ontario and there should be a little more night life out there (Ontario's getting a new Arena for hockey/basketball/concerts (Citizen's bank arena - open in the Fall), and Fontana has the California Speedway). Downtown Claremont is very cute and quaint.
If you haven't heard, there's a good chance a NFL football/entertainment complex (like a mini studio city walk) is going to be built in the City of Industry... about 15-20 mins North/West from Chino/Chino Hills. This will greatly improve the entertainment facilities and night life in the area.
In the most part, the Chino Valley is a perfect place to accommodate all those people in LA/OC who complain that LA/OC are horrible places to raise a family.
and... if you really want fun... Vegas is about 3 and a half hours away vs. probably fives hours away from where you are? Or, you can easily hop on a plane from Ontario International and get to anywhere in the country.
-chuck22b