首先，不建议主动给榜上靠前且未交流过的乐队发消息，如果不巧他当天每天几十上百个邀请又心情不佳的话，你可能会被投诉。 一旦和靠前的乐队有交流，存下PM，第2年回复最后的PM，应该很安全。

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在对票价比较有把握的时候，这句话用来试探乐队是否有特殊票价需求。
Please feel free to tell your expected tickets' price.

更有把握的话也可以这样说。
Please feel free to tell your tickets' strategy in Shanghai, since it's a new city in Popo.

没有把握的时候，询问票价。
Could you please tell us your expected tickets' price?

告诉对方别为门票的限额担心
Please don't worry about the tickets' limitation, I'll keep active enough.

告诉对方别为俱乐部的质量和功率担心
Please don't worry about the quality and power. Since Shanghai is a new city in Popo, we'll keep increasing our club.

这句话用在最后一个PM最后，或者你不想跟他纠缠说拜拜的时候。
Have a good day!

这句话用在他pm你邀请他，而乐队却不接受邀请时。
I'd like to, but your band does not accept invitations.

特殊节日的问候(popo中的节日或者真实节日都可以用)
圣诞节 Merry Christmas!
感恩节 Happy Thanksgiving day!
新年   Happy New Year!
情人节 Happy Valentine's day!
万圣节 Happy Halloween!
僵尸节 Happy zombie day!

这段话可以用再你问清楚你所有的问题后。
Welcome to RPI!
Welcome to Shanghai!
Welcome to China!

当好乐队演出结束后，可以用这段话来询问他下一次计划来上海的时间。如果之前没有交流过，抓住这个第一次交流的机会。
Thanks for your show in Shanghai.It was absolutely amazing!
Do you mind if I wonder when your next Shanghai trip will be? I just wanna record it.

称赞对方的照片(异性)
BTW, you are so charming in your portrait. :p

称赞对方乐队的照片
BTW, your artist picture is so cool!

称赞对方的技能很厉害 :
BTW, your skills' amazing. You know it's my dream. :)

称赞对方的乐队的发展很迅速 :
BTW, your band grew so fast in such a short period. I can't imagine how you did that!

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希望对大家有所帮助，等我遇到新的常用语再加。