I don't frequent casinos, but our original schedule called for us to leave San Juan quite late and I was told this was so that we could utilize the casinos on shore.
The blue building was identified as a former casino which is now a government building by another VTer. However another one of his IDs was wrong, and I can't find any confirmation of this.
Great fun; Full of regilar guests; Good games; Dress code; Beautiful interior.
Dress Code: Well dressed: no tennis shoes, slippers, jeans and shorts.