I generally go for one hour sessions at AMPs. I read reviews of folks who just do a half hour. Question I have is do folks tip differently for an hour session vs. a half hour session? Every time I see references to what someone tipped for a half hour session I have to think whether the same time would be as welcome for a one hour session (am guessing not and my instincts would be to add at least $20 extra on top for the full hour, but curious what others do).