bawbag I'll answer as I don't know if TBC is still on line –
Anyone is welcome – its a social ride not a training ride.
we / they tend to meet at "the bike chain" at cannonmills – the OPs bike shop – and then ride out to the pentlands.
The wee shop RRD mentions is the small grocers at bonally – if you know it.
Folk would tend to ride out from TBC along the water of leith to bonally and climb into he hills from there – but not always – can arrange to meet at any obvious point en route. ie the water of leith visitor centre or at murrayfield somewhere or at bonally.
I can give you directions / grid references or whatever to a meet point.
Edit – a bit slow – story of my life 🙂