The size of the people will determine if they can fit. Some may fit in a 60-inch tub but may not find it comfortable. Also, if it's a standard alcove-type tub, one person may not be happy having the faucet jutting into the back of their head or body. You might want to look at tubs greater than 66 inches long, 33 inches wide, and 22 inches tall for a two-person tub. Also, consider center-mounted faucets along one long end.