This is something you have to figure out for yourself, guy by guy. But here are some guidelines to help you decide.

1. Free drinks are awesome, no doubt about that. But be careful if you are letting a guy buy you drinks. Especially if you don't have any interest in him or get bad vibes. If you are letting a guy you’ve just met buy you drinks make sure you go to the bar with him and get the drink yourself so there is no opportunity for him to drug you. And if you get bad vibes steer clear. No need to hang around this guy even for free drinks. It’s best to stay on the safe side.

2. Don’t take advantage. I think it is fine to let a guy buy you a drink as long as you take the time to talk to him and don’t disappear as soon as the drink is in your hand. Maybe you will end up liking him. You never know. And if he’s bought you two drinks and you don’t really don’t like him be polite and excuse yourself. Say it was nice talking to you but I have to find my friends, leave or whatever.

3. You may decide that you don’t want to waste your time with someone you don’t like when there is the opportunity to find someone you do like who will buy you drinks. There might be someone else at the bar who could get along with this guy. It might be nice to allow someone else the opportunity to hang out with him and get to know him. Even if he is a douche bag.

4. If it is someone you know who has always liked you but you do not feel the same way I would say no. Especially if they are drunk. It’s not really fair to lead them on and it will only complicate things.

5. Sometimes a girl just needs a couple of drinks and a grope. Go for it! Even if it’s just for fun and you don’t like the guy you don’t have to take him home for the night or the rest of your life. Just be safe!