I agree with Mr. Douglas above. But, I must warn you to be really careful. Make sure next time you go out, do it with a responsible partner. Let it be somewhere there who is not drinking and is the designated driver. You can drink. But, please do it responsibly and DO NOT BINGE DRINK. If you are by yourself and start feeling dizzy, sit down, breath a little, then walk, call a taxi and go home. Some people stay in the car until the next morning. But, I wouldn't suggest it. Before you head to the club park in a safe place. So, in the case when you are drunk you can take a taxi home.
Also, don't leave your drinks unattended and don't let strangers watch your drink. Always place a napkin a certain way on top of your drink. And if it looks like it has moved do not drink your cocktail.
Now, if you do not like this guy and you didn't keep in touch with him. Good for you! Now, you only have to worry about being careful. If you are afraid don't go back to the same club. If this guy makes threating phone calls to you call the authorities. If he calls you and wants to see you in a good way, tell him the truth and that you are sorry about it.