Keno and Pai Gow as Alternates for Slow Day at Slots

I see in posts that you some of you play keno with small bankrolls. I would like to play some keno numbers on my Christmas trip... one of those where you pick your choices and play them for several games... what would you suggest for my best strategy and/or picks?
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Any particular numbers that you like to choose?
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I am going to try venturing out into Keno and Pai Gow Mania as my alternates for when I am having a slow day at slots... it seems to me I could play a long time at either one without losing a lot of my bankroll... and I can't stand to not be playing something all the time while I am in Vegas. Any advice would be appreciated!!!
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Thanks!

I don't know what Pai Gow mania is but I do know that you can play the table version of pai gow for a very long time with very little money. If you can find a $5 table, $50 should last for hours if you avoid the side bets.