I always greet the party with a "<Hello!> (^_^ )/ <Nice to meet you!>". After I simply go with the flow.

Most parties I'm in are indeed very quiet. But, if someone feels like talking, I'll be happy to respond. Other than that, it’s more or less about feeling the atmosphere of the group. If I mess up something, I tend to confess about it in a jokingly way. Sometimes this will end up in a funny conversation (or at least get people to respond).

At the end of the Duty, I'll give a hearty "<Congratulations!>" and a "<Take care.>" before I leave the duty.