It seems this is a bug for players joining after you have set the walking style.
A hacky work around would be:
Server:
addCommandHandler ( "drunk",
function ( player )
setPedWalkingStyle ( player, 126 )
setElementData( player, "walking_style_hack", 126 )
end
)
Client:
addEventHandler ( "onClientResourceStart", resourceRoot,
function ()
for _,player in ipairs( getElementsByType("player") ) do
local style = getElementData( player, "walking_style_hack" )
if style then
setPedWalkingStyle ( player, style )
end
end
end
)