Are school proms haram?

Are secondary school proms haram? I'm a male and have finished Yr11 and my GCSEs and have also been invited to a 'prom'. This event will involve music, dancing and halal food with no alcohol present (since we are only 15-16 yrs old). All my other Muslim friends are going, and I've already brought my ticket. Also note that I will stay away from girls and definitely will not dance. However, if I attend then I will miss Asr and Maghrib prayers which I planned to make up after by doing Qaza. Should I still go?