Given the graphic on the matches, it sounds like it was more than just a card room (for poker, pan, etc.)

The article doesn't mention what the confiscated equipment was -- it could have been just poker tables, chips, cards -- but with the reference to the off-shore gambling barges, which had full casino gambling, I would bet on regular casino games too!

Those St. Monica bay floating casinos weren't far offshore from Seal Beach.

Good research!