Formal? Uhhh, no! Definitely come as you are, assuming that you have actually gotten out of you pajamas. And dressed! Geeze....
When? Whenever we want to! And where? In our minds! Well, and here! Boy, wouldn't it be more fun for real! I think I'll buy a lottery ticket today, when I win, I'll get tickets for everyone to come somewhere nice, any ideas?

Now, if any of you ever get anywhere near Tucson, or even Phoenix, and don't say anything, I won't really be happy with you!