Not that I think we should have to lie to keep ourselves safe when we go out, but since this is the reality we're faced with, here are some creative ways to go about it:
1. The Buddy System
I've never personally met anyone who's gone out alone. So if you find yourself in an uncomfortable situation, grab the girls you came with. There's rarely anything that can't be solved through a trip to the "bathroom". This gets you out of the situation and in a private place with your gals to be able to assess the issue and devise a plan to leave if necessary.
2. "Sorry I'm taken."
This is another very common response to a person who is making you way too uncomfortable. Sadly, even if you say this to someone, more times than not they will answer with some gross response about how "well they're not here right now" etc. The best way to solve this is to grab the closest friend that you have, girl or guy, and hug them. "Sorry, I'm out with my boyfriend/girlfriend" *point to person you're hugging*. I can't tell you how many times this has saved my butt in a bar.
3. The Random Girl
Girls are very likely to help out another girl in an uncomfortable situation. If you wander off by yourself, whether you were going to the bathroom, getting a straw, etc., and someone comes up to you and won't leave you alone, this method works well. Find the closest group of girls and hug one. "Oh my gosh I haven't seen you in forever!" While hugging them, briefly explain the situation and they'll be more than happy to help! Wouldn't you?
4. One Liners
"I'm actually waiting for my dad to come pick me up, I still live at home and my parents are super strict." "Wow you know what, you remind me a lot of my dad!" "My brother is a narc, he's here somewhere." Literally any strange lie about yourself that will make this guy rethink everything he walked up to you thinking. While he's processing this information, make a getaway and find your friends.
5. The Angel Shot
This is a relatively new concept that a lot of bars and clubs are taking part in. If you're in a tight spot, whether you're out with a guy who isn't treating you right, or you met someone out for a date and he isn't who he said he is, this is an amazing way to get you the help that you need. It basically goes like this: you go to the bar and order an angel shot. Depending on the way that you order it (with lime, etc.) the bartender will get you the help that you need, whether it be getting you an Uber, walking you to your car, etc. Every place that takes part in this does it a little differently, so be sure to research before relying fully on this strategy.