What type of bike is appropriate for club rides?

Road bikes are appropriate for our road rides. Mountain bikes should only be used when riding with the Mountain bike section of our club. TT/Tri bikes can be ridden in the pace line, but we ask that riders do not use the aero bars in the pace line and keep their hands near/on the brake levers. TT/tri bikes may ride more than 10m behind groups on their aero bars. The triathlon section will also post rides on their Facebook page for TT/tri riders to go out in groups. However, these will not be paceline rides. Hybrid/city bikes are not appropriate for club rides as the speeds are too high.