When choosing a floor for an Irish pub, you should consider materials that are durable and easy to clean, while also fitting in with the overall theme and aesthetic of the pub. Some popular flooring options for an Irish pub include:

Hardwood: Hardwood floors can add a warm and traditional look to the pub, and can be sealed for added durability.

Stone: Natural stone floors such as flagstone or slate can add a rustic, earthy feel to the pub, and are also durable and easy to clean.

Tiles: Tiles can be a durable and attractive option if they are chosen to complement the pub's decor and are designed to withstand heavy foot traffic.

Cork: Cork flooring can also be a good option for an Irish pub as it is warm, soft and comfortable underfoot.

Carpet: Carpets with a traditional plaid pattern or a neutral colour can be a good option, as they are soft and comfortable, but can be harder to clean and maintain.

Ultimately, the best flooring option for your Irish pub will depend on your personal preferences, the layout and design of the space and your budget.