In a nutshell it is against the Sikh religion to smoke.
Smoke, cut hair, hurt or treat others with disrespect
Sikhs have gurudawaras
Sikhs is not real
You have to wear a turban all the time, you can't smoke or drink and you can't cut your hair if you are a man
Since the meetings are of Sikhs, so usually Sikhs are present there.
Yes Sikhs have weddings.
Sikhs join the Khalsa.
Sikhs wear a kara, kirpan, kaccha, kanga, and kesh to show that they are Sikhs and that they are proud.
The Gurudwara is a place of worship for Sikhs.
Sikhs only cremate.
Yes, there are about 500,000 Sikhs in the UK
The holy book of Sikhs is Gurugranth Saheb.