Deflate your beer by letting it stand at room temperature for a while or by whisking it in a bowl for 1-2 minutes, repeating a handful of times until it is no longer frothy. Set aside.
Place the cheese and garlic in the food processor and pulse until crumbly.
Add in the Worcestershire sauce, ground mustard, onion powder, and hot sauce. Pulse until combined.
With the food processor running, stream in the flat beer until the mixture comes together. Add in the salt and pepper, pulsing again until combined. Taste and adjust salt & pepper seasoning to your liking.
Place the pub cheese in a bowl for serving and top with green onion or chives.