A very BIG well done JVR. You did the right thing. Whilst not gambling is a big deal for us, as you have found, it isn’t a big deal for non addicts. they are clearly good friends and as friends there are lots of other thigns you can do together.
Very few people know about my addiction so I think if I was in the same position I would have just said “I don’t gamble, I’d rather not go to a casino”, Again, if I’m with friends we would then do something else.
Again, well done, you deserve your mrecovery.