There are two ways to handle meeting pay.
If an employee comes in for a meeting or to work in the office, they will need to be checked into a job in order for them to appear on the payroll summary report.
You can give that employee the tag of Hourly and they'll get paid for all the time their on the clock. NOTE -- this option puts all of employee's pay on the office column of the payroll summary reports.
2. Create a $0 job for them, call it "Meeting" to clock in and out of.