While "ponticulucians" sounds like it could be a term, it's not a real word.
You could use more general collective nouns like:
* A group of bridge players
* A team of bridge players
* A club of bridge players
* A gathering of bridge players
You could also be creative and come up with your own, like:
* A deck of bridge players
* A hand of bridge players
* A bid of bridge players
Ultimately, the best choice depends on the context and the desired tone.