I used to love casinos in my younger days, both the tables and the slots. The most I won there was $300 (as in I came out up that amount). At a pub on a VLT I won $1300 once. On the actually lottery my biggest was $3,000.
I found gambling fun, but it was never an addiction in any way (not saying you have an addiction, just my own story). I would give myself a set amount that was in my entertainment budget and spend only that.
Now though I buy a lotto ticket now and again, but that is it. I simply lost interest. I think there is nothing wrong with playing provided people don't spend more than they can afford.