Hi infrequentflyer and welcome,
If you are staying in a FF mile earning partner hotel you should present your FC Card at reception and ensure it is noted on your reservation. Generally they will be in touch with FC to credit your miles. Sometimes this can take quite a while and you may need to make a few phone calls to jolly things along. It varies from chain to chain and even from hotel to hotel.
Most important:
1. Make sure your Virgin FC Membership number is noted in the Hotels system.
2. Keep a copy of the receipt (or the original) so you can prove your stay if problems arise.
3. Enjoy your stay!
4. Enjoy VirginFlyer
Bazz
Still Flying