Take the photo, then flag them down so you can show them. Explain that you took it before asking so as to capture their natural appearance rather than a posed one. If they want it deleted, just delete it. Otherwise hand them a card so they know where to find it online later.
Take the photo, then flag them down so you can show them. Explain that you took it before asking so as to capture their natural appearance rather than a posed one. If they want it deleted, just delete it. Otherwise hand them a card so they know where to find it online later.
Source: I did party photography for 10 years.