A new study suggests some Virginians may feel better in the morning and worse late at night.Preview: Plans for a new casino in Tysons have passed the Virginia Senate. The bill passed with a 24 to 16 vote yesterday. The Tysons Entertainment District will hold a casino, conference center, hotel, and concert venue. Supporters of the project say it will generate a million dollars in tax revenue for Fairfax County. Groups against the project say the casino would be harmful to the region