Select a restaurant that has choices for the light eater, the big eater, the meat eater and the vegetarian, unless you know what your guests enjoy. Consider the preferences of your guests concerning smoking when selecting a table.
When the menues arrive, you might make a suggestion, so guests will know what price range to select from. You might ask them whether they would prefer white or red wine, but it is basically your duty to make the actual selection. At one party we attended, the host did not himself drink wine, so he designated another person to select and taste the wine. That is certainly an acceptable alternative, if you do not feel capable of making a choice.