Service tax registration required or not??

hi all,

If i am a proprietor and i have 2 businesses say a hotel business and other taxable service providing business. now these two businesses are at 2 different places and the nature is also different.

Whether Service Tax registration required if individually the turnover does not exceed 10 lakhs but together the turnover does exceed 10 lakhs ?? e g hotel business taxable service 7 Lakhs and other business taxable service 6 lakhs.