I well agree about reading the ladie's web site, you are correct. Not all web sites are clear.  Some even fail to mention what city they work from.  If they do not state how they wish to be contacted, then I follow the following order:

1. Form on web site.  If no answer after two days follow up by email.  
2. Email.  If she does not reply in three days, call or go to girl B.
3. Phone call?
4. TER VIP mail

Plan ahead.  Expect at least a week to set up a date with someone you have not seen.  Have at least three ladies in mind, but do NOT contact all three at the same time.  When girl A fails to reply, go to B, etc.  Two weeks later you may get an email Frobisher A apologizing as she was on vacation.