Ideas and help

Hi all, I'm after some advice and ideas please. We get married this year, but are getting married late and then having evening guests come slightly earlier as not having sit down etc. My problem is we was going to have helium balloons on the centre of each table but have just realised that they don't stay afloat for as long as id thought lol. Has anyone got any ideas please. Colours are white and fushia pink, so need a good bit of pink in room as room fairly plan so the balloons would have been ideal lol xx