The following are advertised in the Marhaba (excellent book that tells you lots of things about Doha which can be purchased ar carrifour)

Marriot - 4298520
International Academy for Intercultural developent QR25 for drop in - 4320974
International Centre for music QR45 - 4671354
Ramada QR35 - 4417417
Sheraton QR35 per class for non members- 4854600
Six senses spa @ Sharq Village - 4256666

I have not tried any but at least it is a starting point.
Kerrie