Openers

noun

1. A person who opens something.
2. A device that opens something; specifically a tin-opener/can-opener, or a bottle opener.
3. (in combination) An establishment that opens.

   "The late-night openers in the mall include two restaurants and a clothing store."

4. The player who starts the betting.
5. (in the plural) Cards of sufficient value to enable a player to open the betting.