Vegas was where the mundane everyday things you were used to spending money on were cheap, which was enticing and made for a fun, carefree mood, while the Casinos charmingly seduced you with the glamour, fun, and wild things that made them all their money.
That was a vacation experience, you still spent all your vacation money but felt as though you had an adventurous good time and a cheap vacation where the spending was voluntary and you had done something totally different from what you spent your money on at home, and you also had the exciting roller coaster chance to make a big win and come home rich, or at least roughly even.
When you sat at the 21 table, you could socialize with the other folks sitting at the table. It was entertainment.