I have accounts with 4 online bookies (all opened up during Cheltenham different years when I find some of the best new customer offers are), and prefer to be able to sit in the comfort of my own home on a saturday morn and place my three weekly footy bets, sometimes I might have a nibble on the horses as well, but then I close down the site until the next week or to collect my winnings (if I have any over £100 or so, smaller amounts I just use as a float to stop me having to top up again).
But there again, my nearest shop is about three miles away and often on a saturday morning i would be unfit to drive.