Most end up getting wasted and missing out on their next day appointments.
As I won't be attending RSA, I will be participating in the Ping event in spirit by, at that time (3 EST!), drinking too much, eating hor d'oeuvres of uncertain provenance, and engaging in witty 'identity banter' with my 5 yr old daughter
Q: Sophie, how many OpenID RPs does it take to screw in a light bulb?
A: I don't know Daddy, but I bet it's more than exist.
I'm sure it will be just like I was there (but alas, without the conference swag).