Louis P. Robbins, the District of Columbia's peppery, bushy-browed chief legal officer, does not look like Scrooge, but to members of the City Council he may be taking on a certain resemblance.

Robbins recommended yesterday that outgoing Mayor Walter E. Washington veto legislation in which the council sought to grant its members free parking outside the District Building and excuse some of them from $15,000 in past parking fees they refused to pay.

"The enactment of this measure would, in my opinion, be an embarrassment to the District government in any future efforts to reduce air pollution by placing restrictions on free parking by federal governmental employes," Robbins declared in a memo.

If Washington were to accept the advice from Robbins, the city's acting corporation counsel, it would be the mayor's first use of a new pocket veto power granted this year by Congress.

The mayor may now disapprove legislation after the council adjourns for the year, as it did Dec. 12, but permit the council to consider passing it again in its new session starting in January.

In previous years, the mayor-who leaves office Jan. 2-had an ineffectual choice, after the council's adjournment, of signing measures or seeing them go into effect without his signature.

The council first passed free parking legislation for itself in 1976, but Robbins ruled it invalid on procedural grounds, leading to the enactment of the pending bill on nov. 29.