Answer:
Light me up in backyard gatherings
I am the most famous dinner ever attended. What am I?
I am the second L in LOL.
I help engines spin and pants stay up.
I am a food with 5 letters. If you remove the first letter I am a form of energy. Remove two and I'm needed to live. Scramble the last 3 and you can drink me down.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.