Answer:
Quote 1 means that sometimes, there are those at the party that Gatsby hosts, who haven't even met Gatsby. They are at the party because they want to go to this no-invite fancy party that this rich guy is hosting. They just want to go out and they have no interest in finding out who the host actually is. They'd rather make up their own assumptions and get on with the dancing.
Quote 2 is said by Lucille, a party-goer. What she means is that she doesn't care what happens or what decisions she has to make as long as she is having fun. She just wants to forget the consequences to everything and have a free for all.
Step-by-step explanation: