All over...according to locations volunteered during new member registration. Obviously anyone could have put anything in and I suspect it is likely many used Detroit to indicated where they are from meaning Metro Detroit, as one might do when out of town where no one would likely have heard of their tiny burb.

Metro Detroit-Windsor Outside Metro Detroit-Windsor
3111 ~ Detroit Major International Cities
139 ~ Warren 50 ~ Toronto ON
137 ~ Royal Oak 20 ~ London UK
131 ~ Ann Arbor 11 ~ Paris France
128 ~ Ferndale 7 ~ Montreal QE
113 ~ Livonia 6 ~ Berlin Germany
104 ~ Dearborn 5 ~ Sydney Australia
91 ~ Southfield 5 ~ Ottawa ON/QE
76 ~ Troy 5 ~ Vancouver BC
74 ~ Windsor 4 ~ London ON
71 ~ Sterling Heights 4 ~ Copenhagen Denmark
67 ~ Farmington Hills 3 ~ Stockholm Sweden
62 ~ Grosse Pointe Nationalities
60 ~ Macomb 163 ~ Canada
59 ~ Hamtramck 46 ~ UK
57 ~ Canton 16 ~ France
57 ~ Redford 15 ~ Germany
52 ~ St. Clair Shores 8 ~ Netherlands
51 ~ Shelby Township 6 ~ Ireland
50 ~ Westland 5 ~ Denmark
46 ~ Birmingham 4 ~ Italy
45 ~ Bloomfield Hills 32 ~ Rest of World
44 ~ Grosse Pointe Park Outstate MI
41 ~ Clinton Township 45 ~ Lansing MI
41 ~ Plymouth 27 ~ Flint MI
41 ~ Roseville 27 ~ Grand Rapids MI
41 ~ West Bloomfield 25 ~ East Lansing MI
39 ~ Allen Park 14 ~ Traverse City MI
39 ~ Northville 11 ~ Grand Blanc MI
38 ~ Eastpointe 11 ~ Kalamazoo MI
37 ~ Ypsilanti 11 ~ Port Huron MI
35 ~ Oak Park 7 ~ Midland MI
34 ~ Rochester 6 ~ Bay City MI
34 ~ Taylor 6 ~ Saginaw MI
34 ~ Waterford Major Cities US
31 ~ Berkley 94 ~ Chicago IL
30 ~ Rochester Hills 67 ~ New York City NY
29 ~ Harper Woods 66 ~ Los Angeles CA
28 ~ Novi 43 ~ Washington DC
27 ~ Dearborn Heights 35 ~ Brooklyn NY
26 ~ Madison Heights 28 ~ San Francisco CA
25 ~ Wyandotte 25 ~ Seattle WA
24 ~ Farmington 24 ~ Phoenix AZ
24 ~ Grosse Pointe Woods 23 ~ Atlanta GA
22 ~ Harrison Twp. 23 ~ Austin TX
19 ~ Clarkston 22 ~ Toledo OH
19 ~ Metro DetroiT 19 ~ Denver CO
18 ~ Milford 19 ~ Philadelphia PA
15 ~ Lake Orion 18 ~ Boston MA
14 ~ Garden City 18 ~ Las Vegas NV
14 ~ Pleasant Ridge 17 ~ Portland OR
13 ~ Howell 14 ~ Cleveland OH
12 ~ Franklin Village 14 ~ Indianapolis IN
12 ~ Highland Park 13 ~ Columbus OH
12 ~ Lincoln Park 13 ~ Houston TX
12 ~ Southgate 12 ~ Orlando FL
12 ~ White Lake 12 ~ San Diego CA
11 ~ Brighton 10 ~ Cincinnati OH
11 ~ Pontiac 10 ~ Minneapolis MN
11 ~ South Lyon 9 ~ Charlotte NC
10 ~ Hazel Park 9 ~ Milwaukee WI
9 ~ Belleville 8 ~ Oakland CA
9 ~ Monroe 6 ~ Baltimore MD
9 ~ Trenton 6 ~ Dallas TX
8 ~ Brownstown 6 ~ San Antonio TX
8 ~ Centerline 6 ~ Virginia Beach VA
8 ~ Clawson 5 ~ Akron OH
8 ~ Grosse Ile 5 ~ Arlington VA
8 ~ New Baltimore 5 ~ Berkeley CA
8 ~ Washington Twp 5 ~ Boynton Beach FL
7 ~ Auburn Hills 5 ~ Henderson NV
7 ~ Fenton 5 ~ Little Rock AR
7 ~ Mount Clemens 5 ~ Mesa AZ
7 ~ Oxford 5 ~ Nashville TN
7 ~ Romulus 5 ~ New Orleans LA
7 ~ Utica 5 ~ Omaha NE
6 ~ Chesterfield 5 ~ Sarasota FL
6 ~ Flat Rock 5 ~ Silver Spring MD
6 ~ Fraser 5 ~ Tampa FL
6 ~ Hartland 5 ~ Texas City TX
6 ~ Huntington Woods 5 ~ Tucson AZ
6 ~ Lathrup Village
6 ~ Melvindale
6 ~ Romeo
6 ~ Saginaw
5 ~ Grosse Pointe Shores
5 ~ Jackson
5 ~ Madison
5 ~ River Rouge
5 ~ Walled Lake
5 ~ Wixom
4 ~ Beverly Hills
4 ~ Inkster
4 ~ Riverview
3 ~ Highland
3 ~ New Boston
3 ~ Ortonville
3 ~ Richmond
3 ~ Rockwood
3 ~ Sylvan Lake
2 ~ Holly
2 ~ Marine City
2 ~ New Haven
2 ~ New Hudson
2 ~ Pittsfield Township
2 ~ Woodhaven
1 ~ Keego Harbor
1 ~ Royal Oak Twp.
1 ~ Wolverine Lake