Hello Lanzarote experts

I'm visiting with my boyfriend mid-September, we're both 22. Will it be busy around that time? We are afraid of going and the place being a ghost town, we'd like a bit of atmosphere. We plan on going out a lot, so what bars/clubs would you recommend?
Also, what will the weather be like around that time? I heard August and Sept are the hottest months which would be perfect for us.
Any other tips for us regarding what to bring, where to eat etc would be greatly appreciated.
Thank you

Forgot to mention we'll be mostly in the New Town
