$args
array(5) {
  ["post_type"]=>
  string(6) "member"
  ["posts_per_page"]=>
  int(40)
  ["paged"]=>
  int(1)
  ["meta_query"]=>
  array(7) {
    ["relation"]=>
    string(3) "AND"
    ["lname_clause"]=>
    array(1) {
      ["key"]=>
      string(9) "last_name"
    }
    ["fname_clause"]=>
    array(1) {
      ["key"]=>
      string(10) "first_name"
    }
    [0]=>
    array(3) {
      ["key"]=>
      string(9) "last_name"
      ["value"]=>
      NULL
      ["compare"]=>
      string(4) "LIKE"
    }
    [1]=>
    array(3) {
      ["key"]=>
      string(4) "firm"
      ["value"]=>
      NULL
      ["compare"]=>
      string(4) "LIKE"
    }
    [2]=>
    array(3) {
      ["key"]=>
      string(4) "city"
      ["value"]=>
      NULL
      ["compare"]=>
      string(4) "LIKE"
    }
    [3]=>
    array(4) {
      ["relation"]=>
      string(2) "OR"
      [0]=>
      array(3) {
        ["key"]=>
        string(15) "practice_area_1"
        ["value"]=>
        NULL
        ["compare"]=>
        string(4) "LIKE"
      }
      [1]=>
      array(3) {
        ["key"]=>
        string(15) "practice_area_2"
        ["value"]=>
        NULL
        ["compare"]=>
        string(4) "LIKE"
      }
      [2]=>
      array(3) {
        ["key"]=>
        string(15) "practice_area_3"
        ["value"]=>
        NULL
        ["compare"]=>
        string(4) "LIKE"
      }
    }
  }
  ["orderby"]=>
  array(2) {
    ["lname_clause"]=>
    string(3) "ASC"
    ["fname_clause"]=>
    string(3) "ASC"
  }
}