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Games which has no cards or boards but it is played like a board game over a table should be on-topic?
For me it should be. Games like that has the same mechanics.
"Board and Card Games" is a handy descriptor but we should not limit ourselves strictly to games with actual boards or actual cards. Anything that plays like a board game, regardless of components, is on-topic here.
Dominoes is to scrabble as Dominion is to Agricola. Just a different form factor IMHO.