I do have the Penguin Club in my NV casinos database, but the source was Eric's matchbook...so no additional information . I'm not showing any other casinos at 1908 Las Vegas Blvd. N.

The 1953 City Directory shows Christina and Thomas Williams at 1908 North 5th Street, in North Las Vegas...which I believe is the same address.

I checked 3-4 1950s phone books; no penguins. I think we only have 3 1960s LV phone books, and 4 from the 1970s...checked 'em all, but the Penguin must have flown the coop . sorry I couldn't find anything...but it's a cool matchbook!