Depends on the crowd. For me, I hand make these:
Lumpia / Filipino egg rolls.
Jasmine or Calrose Rice
Homemade cheese dip with Velveeta with tortilla chips
Roast pork bought pre-made at the Asian market.
A couple other Filipino dishes such as sinigang, kaldareta and/or bistek.
Hot wings, pizza rolls and homemade crab rangoons for the uncultured.
A hand-pick charcuterie board with a variety of cheeses, cured meats, pickled pairings, nuts, etc.
A batch of jungle juice.
A variety of spirits and mixers. If people don't know what to drink, most people that are okay to drink will usually enjoy my green tea shots (Jameson, peach schnapps and pineapple juice), Scooby Snacks (Malibu, Midori, whipped cream and pineapple juice) or my awesome AMF's.
Non-alcoholic beverages.
The above have been my typical formula over the years for my house parties and that typically works for basically all crowds I've had over.
As for setting up, I have those awesome party trays that stay warm, then have a separate location in my kitchen for a bar setup (or my basement at the wet bar too).
Shopping the Greater Denver Area, Colorado Springs and in-between in Colorado. 33 year old male and willing to travel!