Final answer:
Bud, also known as McTeague, appears to be uneasy and uncomfortable at the restaurant with the band, as evidenced by his protest against sitting near the drums and his withdrawn behavior.
Step-by-step explanation:
Based on the provided excerpts, it seems that Bud, or McTeague as referred to in the texts, may have mixed feelings while frequenting the restaurant with the band. His feelings are not explicitly stated, but from his protest about sitting near the drums, his perspiration, and his preoccupation during the afternoon, one can infer that Bud is feeling uneasy or uncomfortable. Additionally, his behavior of drinking beer quietly and showing a lack of engagement in the conversation suggests a level of disinterest or withdrawal from the social setting at the restaurant.