Would there be any interest in having a little gathering at my hotel, the Inn at the Market, smack dab in the middle of the famous Pike Place Market, on Saturday night. I've taken the liberty to reserve our conference rooms for that evening. Perhaps the organized dinner could happen at a restaurant near the Inn (Roger)?
The most obvious mode of transportation would be taking a cab for $5 or so, straight up 1st Avenue. I wouldn't recommend light rail or bus at that time of night.
Mull it over, just throwing it out there as an option. No worries if it doesn't work out.
Btw, here's a link to our hotel, recognized by many as the best boutique hotel in the city.
http://www.innatthemarket.com