It's fascinating that there's a Toastmasters club that meets right at the United Nations! You have something very special, and could use it to promote your club a bit more.
Because I don't know your club, I'm going to have to make assumptions, but I'd suspect your club culture has a deeply international flavor to it. State this in big letters. Do you have members with varying degrees of English-speaking skills? State that too. It may entice someone who's unsure they'd fit in that it's okay to come and visit. (There are many people who need lots of assurance to just visit a bunch of strangers.)
Let the first text be a welcome to visit. Again, I'm making assumptions about your club, but something like: "Learn communication and public speaking with a uniquely international flavor," or, "Learn public speaking in an international crowd," or, "Learn to communicate with people from around the world." These may or may not be appropriate to your club, but you have some real uniqueness, and that style might communicate it, whatever it actually is.
Not everyone knows what Toastmasters is, or what you can do for them. Follow the opening sentence with a few enthusiastic sentences explaining how you can help your visitors grow.
THEN... follow with the "Guests and Members" text you have there. It might be very important to separate the notice to guests to email ahead of time, so it's very visible to a casual browser who only did a quick scan of your site. Add a sentence that you need to put their name in to the security people, to allow them entrance. You might put this in a bolder font & a different color. Remember that not everyone reads through your website thoroughly. It would be a shame if someone missed attending because they missed that very important detail.
Your club name, and the picture on your home page suggests a variety of views, interests, and outlooks. If ever you decide to "reshoot" the front page photo (maybe because of membership turnover) you might try printing the various letters in different fonts and colors, to symbolize that variety. This might take some practice shots, to make sure what you produce makes a readable picture, but it might take your already-great idea and make it even a little more interesting. (You could always photograph just the letters without the people, to check for visibility in the photo. That way you only have to organize actual people once to do the photo.)
The Banner Name at the top of your home page needs fixing. It says "World Voices Toastmasters Club at the United." I understand that the word "Nations" doesn't fit, but you might try "World Voices Club at the United Nations," or, "World Voices Toastmasters @ the United Nations." It's possible you've already exhausted all the alternatives, but see if you can find some way to make it all fit.
Now, meeting at the United Nations may be an everyday, ho-hum thing to you, but many of us might be a little intimidated going into those buildings. You can make it a little easier on us by putting a photograph (from a distance) of the entrance we'd have to go through, on your Meeting Information/Directions page. That would at least show us we're entering the right place, and that security won't drag us out in handcuffs if we enter some unauthorized spot. (Don't laugh... with everything we see on TV and the Internet, we can get paranoid...)
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