Long time blues fan here. Thankfully, there is no shortage of blues festivals... if you've never been to one, make time to do so as soon as possible... you'll be very glad you did.
There is probably one within 100-200 miles of you...
Festivals | Blues Festival Guide Online
BlueFestivals.com
If you're not a fan and wondering what all this adoration is about, you should check one out, too... you'll have a ton of fun and meet some great people (the fans)... and you'll find out that blues is much, much more than the typical slow, sad sounding songs that you tend to think about when you hear the word "blues."
Early Zeppelin is blues. ZZTop's boogie is blues.