Just go up to Gursikhs and say Fateh, it works for me But what more important - going to keertan for laha or to make friends? I have to admit, i've been lucky in meeting chardhikala Gursikhs at programs but make sure you dont treat keertan programs as a social club!!!!!
Check this salok of Bhagat Kabeer Ji.........
ਕਬੀਰ ਸੂਖੁ ਨ ਏਂਹ ਜੁਗਿ ਕਰਹਿ ਜੁ ਬਹੁਤੈ ਮੀਤ ॥
kabeer sookh na ayNh jug karahi jo bahutai meet
Kabeer, peace does not come in this world by making lots of friends.
ਜੋ ਚਿਤੁ ਰਾਖਹਿ ਏਕ ਸਿਉ ਤੇ ਸੁਖੁ ਪਾਵਹਿ ਨੀਤ ॥੨੧॥
jo chit raakhahi ayk si-o tay sukh paavahi neet.
Those who keep their consciousness focused on the One Lord shall find eternal peace.