I just got the best e-mail and even though I only post here occasionally, I wanted to share as I thought this might be a good news item of the day in terms of etiquette
Our venue had a tiny issue during our cocktail hour which they promptly fixed and the event went smoothly on. After our wedding the venue contact person apologized and invited ourselves and two other couples for a dinner and golf evening.
We just set up the date and I had asked about buying golf balls. Her reply: you are our guests, the golf balls are included in the invite.
Wow what a good lesson in hosting!