At a bar, if someone buys you a drink do you owe them a conversation?

Ignoring the very real "dont accept drinks from strangers" problem and sticking to the "morality" of whether it's right or wrong to accept a drink without talking to the person who bought it
Yes it's fine to accept a drink and not talk to the person
No he bought you a drink you owe him a conversation
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At a bar, if someone buys you a drink do you owe them a conversation?
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