I remember sitting at the sportsbook
at the Venetian watching 9EST college BB at 5:30-6 in the morning after an all night poker binge this past Feb. Matter of fact I think I even remember them having a soccer game or two on before then, but it was pretty dead. They took my action before those Col BB games before they started so don't think you'll have a problem. Last weekend I got to the Hilton at 11:30 PM and they were dead already. Not a soul working. Wouldn't even take my bets for next mornings MLB. But that's the largest sportsbook with the most TVs by far that I know of in Vegas.