Hilton HHonors - Earn 5 HHonors bonus points for every U.S. dollar

I recently signed up for an AMEX Hilton card. Have a few questions.

Based on the below statement… what actually qualifies as a restaurant? Would pizza parlors, bars (in a restaurant), etc. count… or only actual restaurants?

I plan to only use this card when 5 HHonor points are awarded.... so i am trying to figure out where it would be best to use this card.

Earn 5 HHonors bonus points for every U.S. dollar (or U.S. dollar equivalent) charged in the following everyday spend categories: grocery stores, drugstores, gas stations, restaurants, U.S. postal service, and for wireless phone bills

all bars and pizza places that i have used the card at gave me 5 points per dollar

If you are an "iDine" member, as I am, you can register your HH AMEX (if you aren't elite they will grant you elite status if you have it with an airline,) and you can earn 10 miles per dollar spent in iDine restaurant(make sure by checking the website they do accept AMEX for miles, a very few do not,) as well as the five points per dollar. And don't overlook the AXON award for Cat 5 - 6 properties.