Front-of-House Risk Is the Real Difference Here
A wasp near a beer garden table in August isn't a background issue, it's something every table around it can see. Flies near a bar in summer aren't hidden in a stockroom, they're right where drinks are being poured. Venue pest control has to account for that visibility, not just the underlying infestation.
Treatment gets timed around opening hours, quiet periods, or closed days, whichever fits the venue, and it's carried out in a way that doesn't turn into part of the evening's entertainment for anyone at the bar.