Delivery List (DL) or Mailing List for Texts

I have a group of friends who like board games, and want me to text them any time we have a board game pick up night come up. But as friends move away or new friends are made I want to update this list. At this point the list is a couple dozen people long and so manually texting that many people on short notice is hard. I'd like a 'few button clicks away' way of sending all of them a single, simple, text. IE "Board games tonight at my house at six!" The Question ------------ Is there a series of operations (on any app) that will let me keep a list of phone numbers that I can conveniently group text? Complications ------------- * I will routinely add and remove numbers from this list. (basically a Delivery List) * I won't have access to other communications platforms for these people. (can't make them use an app or connect to their facebook or anything like that) Other Notes ----------- * I'm willing to use pretty much any app if it does this (and isn't blatantly evil)