my favorite and most practical in my opinion has been
Muay Thai ... very raw and to the point not pretty or going to impress to many chicks .. but certainly evens your odds and a great way top stay in shape .. I studied under a great old guy named "Gordy Gong" for over 10 years .. it can become a lifestyle ..and one hell of a way to vent on mother fuckers who pissed me off after a long night of drinking .....( just being honest ) lol