[QUOTE=HellOnEarth;6313015]Do any of you guys call ahead to make an appointment or ask who is available?
How have these AMP responded to "walk-ins"?[/QUOTE]Yes to both for the first question. You want the peace of mind of getting who you want and at a relatively convenient time. Unless you've seen her before be wary of bait and switches though.
For your second question, some places don't do walk-ins while others will give you a list of whose available. You might be lucky and find a popular girl who's having a slow day but usually the ones that are available are the ones who are either new and not well known or second rate compared to those who are celebrated here.