I personally believe sports betting is better than casinos (although I love rolling dice on WinDice ).
Among sportsbook, football betting is my favorite and I have done lot of such betting in last few months. My favorite site is Wbet7. Wbet7 offers instant deposits and withdrawals with no need of verification of any kind. Moreover, it provides wide range of options to bet on, for example, in addtion to bet on teams, you can bet on number of goals scored, odd/even, half time goals and many more betting options. Also they cover all matches of top leagues plus international fixtures.
And the best thing is that they aren't limited to Bitcoin. You can bet using Ethereum, Ripple, Dogecoin and few other coins too.