Just treat the new shooters like they are part of the club. Then they will feel more comfortable to come back another day. Gaining the new shooters is important since some of the regulars will simply slide away doing other things in their lives.
We have a couple of heated shooting houses, a 16 yard for singles and doubles and a 25 yard for handicap. On days its 25 outside normally 50-80 inside. We average throwing 2000 targets in a 3-4 hour afternoon.