A brunette, a redhead and a blonde walk into a bar and sit down. Bartender asks the brunette what she'll have. The brunette replies, "I'll have an RC". Bartender looks puzzled and says "an RC?" The brunette said, "yeah, a rum and coke". Bartender got her one. He looks at the redhead and asks what he can get her. She replies, "I'll have a BL". Again the bartender looked puzzled. The redhead said, "a Bud light dummy". Bartender got her a bud light. He finally looks at the blonde and asks what she wanted. The blonde said, " I'll have a 15". Bartender once again didn't have a clue. He had to ask what a 15 was. Blonde replied, " duh you freakin dummy, a seven and seven,"