www.instantchess.com
I literally do play 15 to 30 times a day. All matches are tiemd to 15 minutes, so at most theoretically a match can ONLY take 30 minutes, though it takes much more. I also occasionaly play lesser timed matches.
The longer matches that are well over 30 minutes I reserve for night when the day is done. The instantchess games I do inbetween periods of work and going out to enjoy the summer.
So yea, I do 15-30 matches a day.