favorite openers:
"If you don't look like your profile pictures, you're buying the drinks until you do

"
"Tinder tells me you think i'm cute...You have excellent taste

"
"You're kinda cute"
"Are you sitting on an F5 key? Cause that a$$ is refreshing

"
From that point, keep it fun and flirty, and very quickly progress to the number. For number close, i like to say "Texting is easier, what's your number?" OR "Tinder is so glitchy. Give me your number." Note that unless you have established yourself as fun and entertaining, she may stop talking to you all together after you ask. So i would avoid asking for the number until after you get a good 10 message banter going at least.
WORD OF WARNING: Your mind will be blown upon starting it with all the apparently sexy as hell girls that you could potentially bone...
1) Most of these girls are complete teases and will NEVER meet up. It's deceptive because it's actually pretty difficult to get girls to meet up. Flake rate is very high.
2) I found a wonderful rule for myself to follow: IF SHE DOESN'T HAVE A FULL BODY PIC, SHE is FAT and/or UGLY. Trust me. If a girl has a semi-decent body, she is going to be showing it off in some way on a site as shallow as tinder. I have found this to be almost 100% true. If a girl has pictures that are all of her head/face in flattering lighting and angles....she is FAT and UGLY. Even chest and up shots are deceiving because they try to make their cleavage and face appealing, but below the waist they are HHUUUUGE. Before you meet up with ANY girl, make sure that you get other pictures via Snapchat or texting if you havnt seen her body. Unless you're okay with banging big girls...Then by all means, have at it.