I wanted to ask what the '◯' symbol underneath the 金 means below? It seems the black-haired guy is asking the other guy something that's to do with drinking?
This 金〇 is 金麦, a well-known beer brand by Suntory Ltd. You can see the character 麦 on the can.
Here 麦 is masked by the circle in order to avoid issues regarding trademarks or conflict of interest. This is a common tradition in Japanese anime/manga industry. In Japanese, a circle is commonly used to sensor a part of a word for various reasons. See also: Why censor this one kanji?