One of my friends mentioned "I made a faux pas - I asked [former coworker] if he was coming today - and he didn't know about it." The former coworker is an awesome guy, someone I like talking to and seeing in situations like this. But I know a lot of people - I would have loved to invite about 20 people today - and then there's Helen's invitees too! But there's two problems with inviting everyone I want: First, I like events at about 6-12 people. It's enough to have 1-2 conversations going on, give everyone a chance to speak, and get to know each other. And second, I try to pick groups of people who I think will match well to the event - there's grill guys and German food guys. There's loud folk and contemplative folk - and I want a different type of friend at different events.
It's hard to avoid hurting feelings, though - I want to put things on Twitter and Facebook, but I don't want people hurt that I didn't invite them, especially if I invited them last year.
One solution: host more events!