Onmyown You'd be more than welcome to come over to the Dating Thread. Lots of other people's experience for you to draw on over there! 
I used to meet in a public place and only give myself an hour. I used to meet for a first date in the daytime always, and in a well populated public place. I also used to get as much info as I could about them (full name, email address, phone number, OD name and any other significant info I'd gleaned from them such as where they lived/worked) and give it to my brother. I also texted him when I arrived and then made an excuse to go to the loo about 10 mins into the date so I could text my brother and let him know it was ok. And then I would text him again as I was leaving.
I didn't do that for more than the first few first 'dates' I went on, because after that I was more confident in both my judgement and my ability to walk away if something wasn' 'right'.
But I agree that the first meeting is not a real date. It's a quick 1 hour lunchtime coffee to see if their OL persona matches their RL one and to see if you want to go on a date with them. It's not a 'date' in itself.
What he is trying to arrange is a shag. Especially if you only joined yesterday and he asked you for your number and tried arranging this on the first day of messaging you.
Remember what we tell children about stranger danger. Don't go anywhere with a stranger. Good people know that children are told not to go anywhere with people they don't know so will be ok if you say "no" to something. If they are not ok with it, then they aren't a good person. It's more important that you keep yourself safe than it is you don't do something just to avoid upsetting someone who is asking you to do something they know they shouldn't be asking you to do in the first place.
We learn these rules as children so that we can keep ourselves safe throughout our lives. The rules don't change 
OD can be a lot of fun though! Stick with it, but you owe these men nothing but common courtesy. Don't forget that.