Doesn't hurt them not to eat on weekends, it's good for them to go a day or two to clean out their systems. Betta's can get constipation problems from being over fed. I wouldn't go past two days though. On longer weekends and vacations, I bring mine home with me.
Very nice haven!
55 Gallon Fresh Water
1 Blood Red Parrot - 2 Angels - 2 Kribensis - 4 Giant Danios - 5 Cherry Barbs - 1 Gold Spotted Pleco - 1 Upsidedown Catfish - 2 Corydoras - 6 juvenile Kribensis.