I can see whoever I like without a hassle.  Often times I get a discount and priority.

Date Check is more prevalent in the North East. Whereas RoomService 200 is more so in the mid west and west.

Preferred 411 is also used by many woman in the East.

Thats not a hard and fast rule, but your more likely to see woman belong to Date Check in our area.

Date-Check takes the cake for our whole east-coast by far!

rsk2000 doesn't do the best job in letting providers place warning, when needed but is great for chicago/ midwest. and you do see it ever now in again out here.

Perf411 is HUGE in Texas, i think everyone that hobbies belongs to it down there.

i would go with date-check if i spent lots of time in Boston area..

I've had good luck with Roomservice 2000, but I don't think any of them are universally accepted.

I use date-check, have found it useful.  The website does have some problems tho, doesn't work properly w/ firefox (image links don't work for me but if hover mouse over link to see address and then enter address directly in address bar this works).  Does work OK w/ IE.  I prefer firefox but would recommend using IE for dc b/c I have found dc can cause problems in firefox including freezes and crashes.  BTW if anyone else has had these issues I'd be interested, esp. if you've been able to solve them -- maybe change settings or use old version of Java or something?