I've been to a couple.
It can be very good, though I prefer a good mix of seated and non-seated areas.
( Wicca'd Witch needs ideas for a new sig on..., Mon 11 May 2009, 8:03, archived)

Seated people can fuck off.

( Dr. Shambolic je suis charlie, Mon 11 May 2009, 8:04, archived)

/Stands To Attention

( turb0t, Mon 11 May 2009, 8:09, archived)