Etiquette--Elbows

Putting your elbows on the table is frequently thought of as a no-no.  While you shouldn't put your elbows on the table when you're actually eating, it is perfectly acceptable to do so during a conversation.  Leaning forward and resting your elbows on the table is body language that tells other people at the table that you are intently listening to the conversation.  And as a side note, don't fidget while you're waiting for the meal to be served.