What are some fun and interesting things to do in Bangkok while waiting for an embassy appointment?

A US citizen discovered that they needed an appointment for getting an income affidavit at the Bangkok embassy, leading them to seek suggestions for activities in the city while they wait. The thread includes various recommendations such as visiting local attractions like Wat Pho, Wat Arun, the Grand Palace, enjoying a river cruise, exploring diverse neighborhoods, visiting floating markets, and relaxing at cafes or bars. Several users also humorously mentioned exploring nightlife, shopping, and enjoying traditional experiences.