Nice 3 color illo on the front of the 1963 WorldCon progress report:

George Scithers was "Chairman, Parlimentarian, and Calculating Programmer."

Hotel rates? Nine bucks for a single, fourteen for a double. Membership? Two dollars. Honest.

The Guest of Honor was Murray Leinster.

It was David's first convention. One of the things that's great about living in the same house with him is that he keeps this kind of stuff. Here's how David remembers it:

I attended my first sf convention in 1963, Discon, having been unable to attend the Pittsburgh and Chicago conventions just prior. When I was interviewing Joe Haldeman as Guest of Honor at Confluence in Pittsburgh, I asked in the course of the discussion about his first convention, and it turned out that Joe and Gay as teenagers had attended Discon and even entered the masquerade (as Rhysling, Heinlein’s blind poet, and a lady from the Anti-Sex League in Nineteen Eighty-Four, respectively). I had just graduated college and was alone that evening, so I sat at a round table with an older gentleman for two hours and talked about myself and about sf while the masquerade and dance went on. Les Gerber, a New York fan, was dressed as Terry Carr in a sort of zoot suit. John and Joni Stopa were mostly undressed as Incubus and Succubus, for which they won first prize.

The gentleman I was talking to was Harry Warner, and when I told Paul Williams and my other fan acquaintances, they didn’t at first believe me. I was relatively new to fandom and did not know until their astonishment and disbelief that I had spent an evening with the hermit of Hagerstown, whom none of them had met. I had earlier that day been introduced to Walter Breen, so I looked up his Fanac report on the convention years later. It turned out that young Bill Gibson was in that masquerade as a priest of the beetle god. It was his first convention, too. And Mike Resnick’s. 

(I was born in 1962; I didn't go.)