How do I promote a social event type fundraiser?

[NOT]

My friends (we are in 8th grade) are single-handedly planning a masquerade ball fundraiser for Valentine's Day. The event will have a bake sale, DJ, drawing, etc. . Although it is for a school club, it is out of school and not school-sponsored. We're planning to promote by making posters, handing out flyers, and I will be posting it on my Instagram (which has about 315 followers) But what else can we do to promote it? How do we make it seem super-cool and like the ultimate event to go to? We need to sell at least a 100 tickets.

[instagram]

i mean it depends who your try going around school and talk too go to socialboxguru.com and buy followers there really cheap!!! they also sell twitter followers too